So to determine when your watch was manufactured, you will need to find where your serial number fits within the range of numbers. Based on the super-reliable 992B with Elinvar hairspring and mono-metallic balance, the Mod 23 adds a chronograph mechanism, making it one of the most complicated watches produced by Hamilton. Hamilton Model 23 Military Chronograph was widely used during WWII as a navigator's 'stop-watch'. Here are a few tips to find information about your pocket watch: Always input the serial number from the pocket watch movement (the 'mechanism' of the watch). The Pocket Watch Database has compiled data covering the major American pocket watch manufacturers and created an easy way to find information using the serial number on the watch movement. Very fine and exceptionally rare, 18K gold screw back and bezel, Brotherhood railroad watch. Ball Pocket Watch Serial Number Database OnlineīALL & Co., Cleveland (Ohio).Information On This Ball Pocketwatch | NAWCC Forums.
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