I saw an amazing watch the other day. (It is myfriend's.) That was a ref.2499 with a glass cover. How many were made,officialy. (.....Patek Philippe original) thanks googaa...
You didn't post a photo of the dial, however, I suspect this is a 2499/100 which was the last series (fifth series) of the 2499 production. Essentially this was the prototype of the 3970 reference. The fifth series had a larger case to accomodate the new ...