Looking for some help understanding a shop drawing notation

[swirnoff]

First, thanks to everyone who have thrown some knowledge my way. I'm confident enough to dive into my insanely ambitious project of scaling up and building a Curta type 1 calculator. There is one question I have about a notation on the original 1950s shop drawings. There are a total of 7 items where the drawing notes a value can depend on the "Pos.". I assumed this meant position, but 6 of the 7 items only have 1 piece to create. This is an example of a washer where the thickness (unscaled) will range from 1.32 to 1.52mm. So there is position I can think of to which this would apply. One of the others is a steel ball, so it can't be that the value reflects changes in the thickness of the actual piece.

If it helps, the drawings are in German. I have also checked the drawings of the various sub-assemblies that these 7 pieces fit into and there is no indication of changes to dimensions based on where the components are placed. Anyone have any idea what this abbreviation might mean? Thanks.

 

[Mauzinette]

Judging purely by the drawing, I’d say that Mass (Maß) „α” stands for dimension alpha and that the Greek letter is simply used to indicate a variable dimension.

 

[Ischgl99]

Mass "a" means dimension "a" and Pos is position, so position 1 is 1.32 to 1.34mm thick. This could be a general drawing that is used for several different assemblies, so what you are working on might only use one or a few of the positions instead of all of them. Instead of making separate drawings for each size, it looks like they just consolidated them into one drawing.

 

[RickKr]

This is common for tools that come in different sizes, such as scroll chucks, etc.