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From the American Horology Archive:
Seth Thomas Watch Co.

Grade: 105

Manufacturer: Seth Thomas ?
Manufacturer Location: Thomaston, Connecticut ?
Movement Serial Number: 187888 ?
Grade: 105 ?
Model: 16 ?
Estimated Production Year: 1901 ?
Run Quantity: 900 ?
Grade/Model Run: 12 of 19 ?
Grade/Model Total Production: 18,400 ?
Size: 6s ?
Jewels: 11j ?
Movement Configuration: Hunting ?
Movement Finish: Two-Tone ?
Finish Pattern: Outer Ring ?
Movement Setting: Lever ?
Plate: 3/4 Plate ?
Regulator: Plain ?
Hairspring: Flat ?
Adjusted: No ?
Railroad Grade: No ?
Movement Markings: Seth Thomas Thomaston, Conn. Safety Pinion. ?
Case: Various ?
Run ID: 310.105G9.6S63.616M23.H194.L292.11J52 ?
Data Research: 1904 Seth Thomas Serial List ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 2 (0.22%) ?