I have a good collection of these, but still wonder if I have the complete set. I have 1972 through 1975 and the 74 1.8 EFI, plus an early undated one that is very extensive, so I think it is the first of the series. Was there a 1971 or a 1976 issued?

I have photos of a couple of German language ones on my collectibles site Dave. The first one I have is 1973 and the last is 1975.

These are really cool pamphlets BTW, for anyone who has not seen one. They show all of the updates from teh previous model year and include information not shown anywhere else.

i also have a couple of those.... do you have a question about contents or.........?

Just want to find out if I am missing an issue. These are pretty rare and not many know about them. The first issue I didn't know existed until I saw it for sale. I don't have the 71 or 76 issues, so I don't know if they exist or not. I try to collect all the literature I can for research purposes. Reading the flat rate manual is interesting.

Does anybody know/own one of these?
The first occured Dec 1973, released by the "VW-Porsche Vertriebsgesellschaft".
They show with flowcharts and further descriptions how to find errors with the FI in a systematic and methodic way.
German title: Elektronisch gesteuerte Benzineinspritzung - programmierte Fehlersuche
Porsche print number of the first issue: 4530.10

Unfortunately I don't own one of them ...

I think I have one similar to the third image. Never saw anything like the others. Do you have the literature item numbers on the other pieces?
I picked up a lot of my literature from dealers; the flat rate manual, and the technical bulletin binder are not items usually found.
For that matter, does anyone else have the technical bulletins? It would be useful to compare notes to ensure we can come up with a complete set.
What other unusual literature is out there?

Unfortunately not, the only thing I know for sure is that #4530.10 is this one: