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From the American Horology Archive:
Seth Thomas Watch Co.

Grade: Henry Molineux

Private Label(s) in Run:
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Manufacturer: Seth Thomas ?
Manufacturer Location: Thomaston, Connecticut ?
Movement Serial Number: 55138 ?
Grade: Henry Molineux ?
Model: 2 ?
Estimated Production Year: 1890 ?
Run Quantity: 200 ?
Grade/Model Run: 1 of 7 ?
Grade/Model Total Production: 390 ?
Variant Est. Production: 300 (18S-M2-17J-N) ?
Size: 18s ?
Jewels: 17j ?
Jewel Material: Ruby ?
Jewel Setting: Screw-Set ?
Movement Configuration: Hunting ?
Movement Finish: Nickel ?
Movement Setting: Lever ?
Plate: 3/4 Plate ?
Balance Type: Expansion ?
Regulator: Reed ?
Hairspring: Breguet ?
Standard Dial Type: Double-Sunk ?
Adjusted: Yes ?
Adjusted to Position: Yes ?
Adjusted to Temperature: Yes ?
Adjusted to Isochronism: Yes ?
Movement Markings: Henry Molineux Thomaston, Conn. Safety Pinion Pat'd Dec.6.'87. Adjusted ?
Case: Various ?
Run ID: 96.G4.18S96.182M39.H39.L91.17J5 ?
Data Research: 1904 Seth Thomas Serial List ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 13 (6.50%) ?