Thus, most watches have two manufacture dates, providing a useful tool for determining whether a particular case and its movement were originally intended to be paired. For anyone interested in reviewing the data upon which, in part, these observations were based, visit Watch Data 1. I have recently begun to develop a theory regarding certain. Bulova Company to the Bulova Watch Company, thereby providing an important date reference for these watches based on the movement signature. Many observers of Bulova watches are confused by the sometimes seen patent dates stamped on the inside of some Bulova watch cases, and they misinterpret such dates as the time of manufacture. For purposes of assigning a date, Bulova watches break down nicely into three basic groups: 1) pre- 1. Jewels railroad watch c.īulova - Date Symbols, Codes, Serial Numbers. 4 hour dial (note slight damage to porcelain at 1.

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