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. Here are a few tips to find information about your pocket watch:
Commonly referred to as the "Gray Book," this Waltham resource was published in September 1954 and contains information on watches manufacturered by the American Waltham Watch Company from 1857-1954. Over the years, countless mistakes have been discovered in this resource. Many of these mistakes have been attributed to similar watches being merged into combined serial ranges. Therefore, caution should be excercised when evaluating this resource. When a discrepancy is found, it is advised to trust the watch, not the source data. Despite these faults, the "Gray Book" is still one of the key sources for Waltham serial range information.