dr_gallup
Moderator
I got a scanned copy of an old (1966) German tooling drawing. It has some symbols I don't understand. I think it has something to do with how the surfaces are produced, Cut, rough ground, finish ground, etc but that is just a guess. I hope this jpeg which is a conversion of the original tiff is legible. The symbols are a tilde (~) and 1 to 4 inverted triangles. If anyone can translate the text I will be grateful.
View attachment 759
View attachment 759