Question: What is the meaning of the " 18 " inside the case back?
By: amanico : September 13th, 2014-13:34
For years, I wondered what was the meaning of this number engraved below the Ref Number. Here in a 6542 case: I found this very same number in different references which can be dated in the Fifties, till 1955 ( Explorer, for example ). Does anyone know so...