OK,

I've got a longines mens watch- I date it to about 1942 by the serial number. It appears to be a curvex- the case opening measures 25.5 X 18.5 mm so, looking in the GS-crystal catalog there is a 25.7 X 19.7. Ordered- 19.7 is very big.

Help.. What are the advantages and disadvantages of different crystal press systems.


M