Hi Joe,
basically it is like this:
The 14 is the number of sides, as you said.
And the 4 and 16 are simply the number of the line in the spreadsheet/table where they are listed
Quite simple.
For the concave ones, this ends at 7, but the last one actively used was the 4.
For the straight ones, the table ends at 16.
In the given line one can find the diameters etc.
I would say that these drawings are not known. I have never seen them anywhere before or after.
Even though they did standardise these tool surfaces in the Swiss watch industry in the 50s/60s.
I found them in one Swiss archive somewhere, after a lot of digging.
Cheers
Martin
Martin, Thank you.
I felt as though two of the illuminati were having a secret dialog in semi-public and . . . well . . . I for one felt left out!
How many among us apart from you and Nico have a copy of "The Arc of the Covenant"?