I am currently looking into getting a windscreen (as the UK or parts catalogs calls it) but I am only interested in one that would have the original shape (rounded top).

I saw a few restored 914-6 on display at Rennsport VII with the OE windscreen shape and they were Pilkington, not Sigla. I wasn't able to confirm if Pilkington is the new supplier of Porsche 914 windscreen replacement part, but I have a strong feeling it is.

These OEM windscreens are available in clear or tinted per these two part numbers.

Clear: 914-541-101-10
Tinted: 914-541-102-10

By tinted, I am not sure if they mean with a dark shaded band at the top or overall tint like the side glass (Delodur-1 and Delodur-F, -1 clear and -F tinted).

If someone has this information, please comment.

My car has the Delodur-F (tinted) side windows and I would like to get the correct windscreen for it. That being said, I am not interested in having any dark shaded green band at the top, I would prefer clear, hence the question above.



For those who aren't familiar with what I am referring to as the shape, I found these two pictures trying to show it. The orange car (Porsche's 914-8) obviously has the genuine windscreen while the red car has a generic replacement. You can see how the top part of the windscreen is "bubbled up" creating a nice flowing live vs a sharp transition.

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@914werke any info?

I know what you're talking about, and noticed this phenomenon with the windshield in my 1973 914 in the early 1990s. Fwiw, I actually preferred the looks of the replacement windshield, which lost the "bubble" vibe of the first one, and still do.

But I'd love to know more about this detail.

As for tint, my current windshield ordered through a Porsche dealer is all clear—but I think I preferred the way the tinted upper section in my last one was super subtle yet hid the gangly visor hardware in my car, old Automotion stuff that allows you to swivel the visors to the side windows to block a hard sun.

@horizontally-opposed : Are your side windows tinted (Delodur-F) or clear (Delodur-1). Is the windshield matching your clear or tinted windows? Just wondering if by "tinted" Porsche is referring to the upper colored band, or the overall light green shade tint like the -F side glass.

Here are the two cars from Rennsport with Pilkington windshield. All same number but probably a different production year, notice the variance in inscriptions.


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EDIT: I think I have found my answer. Looks like the top colored band is too modern and was never offered on our cars. The tinted is for the whole glass per images taken from Sierra Madre Collection Website, both Genuine Porsche.



Clear 914-541-101-10:

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And tinted 914-541-102-10

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re original windscreens - its all here.

http://www.914world.com/bbs2/index.php?showtopic=363328

the original glass suppliers were all german subsidiaries of st. gobain.
most cars had screens branded kinonglas.
a lesser amount got sigla screens.
it did not appear to be random, the two types cluster in batches.

the sharp radius curve at the top of the screen is a design feature imho.
the NSU RO80 had exactly the same detail and was released a few years before the 914.
if you ask me the porsche styling studio were influence by that car and did their version.
it means when you look at the car front on you don't see the windscreen frame at the top. just the glass rolling over. pure aesthetics.

pilkington is as far as i am aware the factory supplied spare part since the 90s at least.
i have a spare factory screen and its branded pilkington. been sitting in a box in my garage for years for just in case.

i am aware that before covid pilkington had a special scheme for owners of early series 911s to provide replica sigla screens right down to reproducing the original sigla etching and brand name. they would do this for restorers. the cost was fairly expensive as the screens were produced in a factory in i think norway or sweden or something in very small batches. i don't know if they still do this.

but anyhow the pilkington screen ought to be the same as the original screens in its shape. including the bubble like top curve.

Good catch!
I hadn't noticed that!

Made me go look at the 75 I have.
Mine's flat!
I believe mine's original.
VW logo but the other windows have both VW and AUDI on them.
Front window "Laminated -F" and beneath that "Kinonglas-Kristall-FIRA-F-HI"
Side windows have Delodur 1-F
Rear has Delodur-1

Maybe my front has been changed?
It's definitely dealer installed if it has been replaced.
My car has been in a garage since 88 and only shows 31K which I believe is accurate.

ps

by the way the 914-S (or 914/8) in the factory museum does not have its original screen.

its very unusual. branded SEKURIT - which is a trade name for man safety glass by St. Gobain.

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at some point the screen must have been broken and replaced in the piech car.
how can i tell.
the screen has EU regulation markings on it that post date the manufacturing period of the 914s. its that circle with the E in it.
St. Gobain must have been the OE spare part supplier during the late 70s until some time when pilkngton took over.

the other silver 914/8 that belonged to f oorsche has an original kononglas screen.

re the bubble in the curvature of the glass and the two photos you have posted. -
bear in mind that the two photos are not directly comparable. one is photographed with camera eye level higher. the bubble is very apparent at the outer edges of the screen where the curvatures are greatest at the top left and right sides. not so much in the middle. if you lower the camera eye level a little you pick it up. so there is not necessarily any difference in the two examples posted at top of page.

close.
but not quite.
its all in the thread i linked to.
both sigla and kinonglas did clear and tinted. the sigla had a lovely greenish look in tinted form. less so the kinonglas tinted. diifferent process for the kinon screens.
later cars from 75 had VW and Audi logo. before that just VW logo. only the sigla windscreens ever had the porsche P in a triangle logo. it did not seem to matter if it was a 914/6 or 4 as to whether it got the P logo sigla screen.

re that curvature. its towards the edges of the screen at the top that its apparent.
but less so at the centre top.

Wait... Original windshield, yet flat?

Also, you have Delodur 1 -F or Delodur-F? From @Wonkipop thread link, it looks like there might have been rare instances of Delodur-1F...

1F designates tinted side glass..
if the side glass does not match on a car means one of the windows has been replaced with a mismatch. ie a tinted window in an original clear glass car or vise versa

like i say. if you have a kinonglas screen or a sigla screen you definitely have a factory original screen. reference the curves off that. the photo example at start of thread is not necessarily a reliable way to draw conclusions about screen shape and curvature.

if you have a SEKURIT or a SUDGLAS branded screen its likely a OEM replacement part from late 70s into early 80s. and as far as i am aware its pilkington from there on.
when it comes to factory supplied genuine windscreens.

Anything with an E in a circle and other regulatory conforming markings indicate its not from the period of manufacture.

a surprising number of 914s that have been for sale on BAT still have their original windscreens. not bad for half a century on in time. testifies to some degree that a great many cars did not do huge mileage. just rusted before their time.

I highly doubt anything on that car is exchangeable with a production 914, including the windshield.

What i've seen from the #914/11 prototype, each and every body panel is hand made and looks different from production.


PS:
Here's an interesting windshield marking

@Montreal914

in answer to your original question.
if you have 1F marked side glass then you originally would have had a tinted screen.

i am not 100% on this. but i think there was 3 ways you could order the glass.

a clear screen and clear side glass.

a tinted screen and clear side glass. (not sure about this one but some indications this may have been so)

a tinted screen and tinted side glass.

the original tinted screen did not have a band at the top.
the whole screen was simply a tinted darker color.
this was in fact done with the glass itself and not an interlayer.
the composition of the glass was altered producing a darker color.
that was what i was able to work out studying the manufacturing history.
sigla and kinonglas (st. gobain) had two different chemistries or recipes for that type of glass.

what you want from pilkington is their tinted glass version which will be homogenous all over.

pilkington is the correct screen to get.

Is that from the prototype? It is hard to make out the letters. What does it say?
Matt

This car's side windows are marked Delodur-1F and the rear window (no heat) is marked Delodur-1.

I don't think this critter is special at all, just very, very stock.

It still has a sticker on the center steering pad that says.

TO START ENGINE:
-SIT DOWN
-BUCKLE UP
-TURN KEY

It's original and I understand why every single owner but this one ripped it off the very first day.
It makes the customer look stupid!
What it didn't say was "No need to pump the accelerator-the modern fuel injection takes care of that" which is what I believe Porsche was trying to accomplish with the sticker.

Edit: On second thought that sticker was created due to the seatbelt interlock system.

I'm NOT going to remove it!
I'm going to completely replace the steering wheel with a 930S wheel I bought from Bob B.
I will carefully pack the original up for storage...
The gorgeous 930 wheel can be modded.
The orginal plastic 914 cannot!

possibly you are right.
whatever the case the screen in the piech 8 does not date from when it was built.
its much later and has the EU markings that came into effect in the late 70s.
so that is when that screen went in.

there is only two things it can be. a handmade one off replacement or the common garden variety OEM screen from the late 70s or early 80s and it fitted straight in.

the silver 8 does have a kinonglass screen like every other common or garden 914 ever made. its supposed to be a prototype shell originally too?

i suspect that rust bucket prototype car in your neck of the woods might have a replacement USA manufactured aftermarket screen judging by the logo on the right hand side rather than left. the other thing that proto car has on it that is really unusual is P branded delodur side and rear glass. that is unique to the prototypes. not sure what the red piech 8 and the silver 8 have for side glass. haven't come across detail photos to be able to see. but would not be surprised if the red 8 had similar side glass to the rustbucket proto.

Pilkington owns Sigla. I order glass direct from Pilkington and they told me they own Sigla overseas.

thats right. so they have rights to the brand name now.
hence their special scheme to reproduce sigla branded screens for early 911s.
but the sigla branding is not used by pilkington in their modern product.
far as i know its a brand name that has been retired from general use.

i imagine if enough 914 owners banded together and were fanatical enough pilkington would produced a batch of sigla branded 914 screens. i came across all the info on this on an early 911 forum and the discussion was all from about 10 years ago. you had to prepay and preorder the 911 screen. full 100% money down. then you had to wait for up to 6 months to get the screen. they took orders and once they had enough orders they did a batch of screens. i am pretty sure they would have been standard pilkington 911 replacement screens pulled off the line before they got etched or transfer markings bonded on. then they would have been sent to another small scale supplier who reproduced the specialist old school etched markings on them. even so they were not exact reproductions of the etched markings as EU regulations absolutely required that the modern regulation code symbols were included in the markings before they could be sold and supplied. but they were marked SIGLA and not Pilkington.

i guess the 914/6 is starting to get to the point where it is in early 911 territory for some restorers?

yes - all that stuff is original.
but does not mean the windscreen is.
what is the logo on the windscreen.
if its original its either knonglas or sigla. thats it. all there was.

Thank you!

Yes, Pilkington tinted (914-541-102-10) seems to be the one I would be looking for. That being said, I wish there were "bubbled" replicas at lower cost... Not looking for concours here, just happen to prefer how the upper curvature blends nicely in the car's lines.

Now, the hunt for the best Porsche price...

My first post was accurate. "Kinonglas" beneath a VW logo.

I just rechecked- it's colder than hell here right now! You're middle of summer, right?

When I solve my Apple to Microsoft to 914World issues I'll post a pic of it.

i can decode those screens montreal914.
they are both identical.
they are clear screens (laminated safety glass).
these days clear is defined as more than 70% light transmittance.
this is pretty much where clear screens are in the modern era.
at 70%. slightly darker than a clear screen in the late 60s early 70s.
the indicator of that is the two vertical marks II above or next to the E! in the circle.
E1 in the circle means it meets german standards and is a screen sourced from germany.

if it was a tinted screen (ie less than 70% transparency it would have a V above or next to the E in a circle.

it really depends on the country whether you can have less than 70% trans.
i know in australia you can't. any darker tinting is restricted to a band above the central zone at the top of the window. most modern screens if you look real close have a line and and an arrow marking on either side down about 6 inches or so from the top.
above that line a darker tint can be applied.

both those screens are identical.
only thing different about them is when they were made.
that is indicated by the dots and the number which is the last line of the markings.
the number of dots tell you which month. the number indicates the year.
for instance the bottom one of those two was made in feb 2007.

i think what there is to understand these days and this relates to your question. tinted screen or not is that pretty much all windscreens are produced with glass at around the 70% transmission point. this is for reasons of health. ie skin cancer. that the limit in most countries by regulations so they take it to there. and thats called a clear screen.
and a tinted screen gets the darker band at top above the line and arrow markings.
and its an applied coating.

back in the 60s and 70s i think it went like this.
a tinted screen was a darker glass that went down to the 70% transmission threshold.
and a clear screen was much clearer with higher light transmission.
in the current age i don't think you can easily get a screen as clear as original ones used to be.

but if your car is meant to have a tinted screen to match tinted side glass then the current pilkington screen as you have photographed from two cars would i believe be the closest thing to what was in fact the tinted screen back in the day.

yep - orig screen
and they do look flatish in the middle.
as i remarked in my earlier post, the photo of the 914/8 as demonstrating curvature of original screens is slightly misleading. it all depends on the exact position of the camera.
the bubble like curvatures are out towards the outer edges. so it doesn't take much to make one look different from the other in photos by just a very small amount of difference in camera angle and position.

Well, the two numbers seems to be available, both 101 and 102.

Here are the screenshots of both numbers from the same Porsche dealer, yet the price is different. I doubt these are the same part with different price. Surely, there must be a difference. From the Porsche parts document, the 101 is clear and the 102 is tinted.

But you clearly know more than I do!

If you think the cheaper one from Porsche will be a good matching shade with my side Delodur-F, I definitely prefer the lower priced one. BTW, that price was $508 and went up to $570 January 1st.


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its all a mystery mate.
not sure what porsche is offering.
but whatever the case, you are after the tinted one given your side glass and you will find the clear one very clear if it is in fact a match for the original factory ones.

i can tell from those original two photos you put up of pilkington screens on two cars that they are marked as what is commonly available on modern cars as a clear screen.
the two vertical marks (sometimes sloping or italicised) that are next to the circle with the E. what indicates a standard clear screen in the modern world.

the original screens had very different coding on them that indicated clear or tinted.
in the thread i linked were those markings for both sigla and kinonglass.

as to what porsche or sierra mardre are offering i don't really know.
i think how they would indicate its a clearer glass than 70% must be by some other coding than what is shown in those two pilkington screens you posted.
none of the rest of the coding in those screens indicates tinting to the best of my knowledge. its entirely possible they are reproducing somehow those original much clearer screens. but i am not sure really how that would be marked or indicated on the screens.


PS
its all a pretty esoteric area.
for instance back in the day if you got a sigla tinted screen what that meant was the glass was in fact a very beautiful noticeably greener glass - thats what distinguished them. a lot of 911 guys go after those screens for that reason.
and if you got the kinonglass tinted screen that was more about it being a darker grey color. it could be that porsche classic are offering that distinguishing feature these days with their genuine spare part screens. it could be a flow on from their supply of 911 screens. its really hard to know exactly what they are up to unless you can open a box and compare the two screens. all i know from down here is that the early 911 guys covet those tinted sigla screens for the colouring and maybe that is what porsche classic have gone after being able to offer.

Unfortunately, I didn't check to see what was the shade of the side windows on those two Rennsport cars.

I doubt it would be possible to check both Porsche new windshield side by side because no one stocks them, it's all on order. So I guess I will have to be patient and try to search for cars I could look at in person.


In the meantime @Technicalninja , here is a picture of the middle area of a knockoff replacement windshield. It's really flat at the top for about 12" and barely 1/8" in 15".

I will be curious to see a similar picture of your original windshield.

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you could try getting in contact with pilkington classic direct @Montreal914 .

i found the link i had filed away from screen research a few years back.
link still works. its a european website. maybe UK based.

https://www.pilkington.com/en-gb/uk/automot...assic-cars-home

they have a whole series of listings for the 914 that i cannot unscramble.
i have no idea what they mean as they don't have an abbreviations decoder to go with their classic parts listing.
but perhaps if you emailed them they might explain what they all are.
this would be where porsche themselves are sourcing the windscreens they sell as spare parts. its likely all this reduces down to something like a clear screen version and a "tinted" screen version but i can't work it out.

when you select porsche in their home page you get this list for the 914.
which is more than two different types, so i don't really know.
this could be a reference to all the different windscreens that were in the 914s as they progressed through the model years. i do know that the kinonglas screens evolved and updated processes were used in manufacture originally. so pilkington might simply be referring to all those particular original screens using some sort of original spec list from the original manufacturer suppier (subsidiaries of St. Gobain). only the kinonglass screens evolved. the SIGLA screens seemed to stay the same.

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its a neat website when you cruise around in it.
they can pretty much make anything you want and will ---assuming you want to pay for it. there is a neat little piece in there on remaking the windscreen for a 917.

also if you cruise around you can find the bit where they can offer a windscreen marking. that is more or less period correct but incorporates the modern EU approval code markings that make your screen legal for registration and road use after restoration.
they do the triple XXX and SIGLA brand recreated markings. which are the two they have rights to reproduce. i think XXX was the original pilkington safety glass brand for the UK market. was not on porsches. i have no idea if you can get a one off screen or whether it has to be a minmum batch. but you fill out the forms that pop up on the website and order it. i dunno, if 914/6 guys out there want to get super uptight about it they can get one (it still won't be absolutely correct but ) but it will be legal.
you can get them in white ink. black ink or etched in.

@Montreal914
i have the original kinonglas screen in my 74.
straight edge at middle directly above mirror.

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