Let's talk windscreen/windshield Options

[Montreal914]

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. (IMG:style_emoticons/default/smilie_pokal.gif)

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.

[sportlicherFahrer]

@914werke any info?

[horizontally-opposed]

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.

[Montreal914]

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.








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:





And tinted 914-541-102-10

[wonkipop]

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.

[930cabman]

(IMG:style_emoticons/default/popcorn[1].gif)

[technicalninja]

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.

[wonkipop]

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.



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.

[wonkipop]

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.

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.

[Montreal914]

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.

Wait... Original windshield, yet flat? (IMG:style_emoticons/default/blink.gif)

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...

[wonkipop]

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.

Wait... Original windshield, yet flat? (IMG:style_emoticons/default/blink.gif)

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. (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif)

[SirAndy]

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.

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.
(IMG:style_emoticons/default/popcorn[1].gif)

PS:
Here's an interesting windshield marking

[wonkipop]

@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.

[mate914]

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.

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.
(IMG:style_emoticons/default/popcorn[1].gif)

PS:
Here's an interesting windshield marking

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

[technicalninja]

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.

Wait... Original windshield, yet flat? (IMG:style_emoticons/default/blink.gif)

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...

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!

[wonkipop]

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.

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.
(IMG:style_emoticons/default/popcorn[1].gif)

PS:
Here's an interesting windshield marking

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. (IMG:style_emoticons/default/beerchug.gif)

[longballa]

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

[wonkipop]

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? (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/beer.gif) (IMG:style_emoticons/default/beerchug.gif)

[wonkipop]

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.

Wait... Original windshield, yet flat? (IMG:style_emoticons/default/blink.gif)

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...

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!

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.

[Montreal914]

Thank you! (IMG:style_emoticons/default/smile.gif)

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...