The already well-established Seth Thomas Clock Company manufactured pocket watches from 1884 to 1915. The movements varied in quality, from low-end 7-Jewel watches to the prestigious 25-Jewel Maiden Lane.
Existing Seth Thomas factory records from this era of pocket watch manufacturing are sparse. Fortunately, a few catalogs and advertisements have survived, providing a path to begin reconstructing a lookup database.
We focused our primary efforts on serial numbers up to 1,000,000 (around 1900). Shortly following that period, the company stopped stamping serial numbers in many batches of movements. This practice, paired with lack of records, makes reconstruction of serial numbers 1,000,000-3,600,000 much more difficult, if not impossible for some ranges.
The majority of the collectable Seth Thomas pocket watches lie within the range that we studied, including the desirable Model 5 movements, spanning the serial block 200,000-400,000.
Using existing serial range records, and compiling over 1,000 observations from various locations, we were able to reconstruct a database that will provide a foundation for ongoing research.
Currently, our evaluation algorithm indicates the following coverage in the reconstructed database up to serial number 1,000,000:
Jewel Count: 43.37%
Acknowledging that some of the reconstructed data may be inaccurate, the information and coverage will continue to improve over time.
If you have additional information that would assist in the efforts to improve the Seth Thomas database, please let us know.