Originally Posted by
ozbeycem
Thank you Allen. Going through some old pictures one. This one is labeled 1968 912 Wrenches. Interesting to see the 17/19 size is a Selected Steel. I do not know the story for SWB tool kits, but I know the following story for sure and saw many examples of it. Starting in 1973's, Porsche was running out of DFS wrenches. So they started using SSS's. The first size to run out was the 17/19 sizes. So you would see 1973-1975 tool kits with 17/19 SSS (milled) and the rest being DFS (not milled). I saw many 76-77 tool kits with DIN 895 stamped 17/19's and the rest being SSS stamps. So it looks like it carried over to next generation tool kits.
Anyway, here are some wrenches that were in a 1968 912 tool kit, DFS's do not have milled ends, open to discussion if they are correct or not. Would be good to learn. I don't have them anymore so cannot take more pictures.