Through my low price trolling of the bay I came across these...I managed to snag all of them but one that sold before I saw them.
They are blueprint negatives of 3 different Hamilton watches and one of the factory. The movements are the 950B, 992B and the Model 21 Chronometer. The pictures of the listings did not show very well but I could make out what each was, that and the titles helped. lol
They had found a further 3 and managed a good picture of them but the others were not as clear. But all of them date to the early 40's.
Model 21 balance with screws
This is one of the balance wheel itself without screws....
The 992B is harder to see but.....
I am going to get them printed up and see how they come out.