DarHin
Posted March 14, 2012 - 10:39am
This is why crystal dimensions are important. We can often eliminate models depending on the crystal. Sometimes the only clue to the model is a crystal reference.
As far as the year of the crystal the Perfit is from their #11 catalog. I don't know when it was published. The Watch Craft is from their 1957 catalog so we know it pre-dates then.