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From the American Horology Archive:
American Waltham Watch Co.

Grade: P.S. Bartlett

["Style A","Style B","Style C","Style D Chronodrometer","Style E"]

Manufacturer: Waltham ?
Manufacturer Location: Waltham, Massachusetts ?
Movement Serial Number: 374198 ?
Grade: P.S. Bartlett ?
Model: 1857 ?
Estimated Production Year: 1868 ?
Run Quantity: 500 ?
Grade/Model Run: 414 of 2837 ?
Grade/Model Total Production: 293,359 ?
Size: 18s ?
Jewels: 11j ?
Jewel Material: Ruby ?
Movement Configuration: Openface ?
Movement Finish: Gilt ?
Movement Setting: Key ?
Wind Mechanism: Key ?
Plate: Full Plate ?
Adjusted: No ?
Railroad Grade: No ?
Case: Various ?
Run ID: 4022.G2425.18S3762.181857M3559.O4018.K4020.11J2353 ?
Data Research: c.1900 Waltham Factory Ledger Book 1 [NAWCC]
c.1900 Waltham Factory Ledgers [Ehrhardt Transcription]
1954 Waltham "Gray Book" List
NAWCC Waltham Serial Digest
?
Database Version: v52.978 ?
Advanced Metrics
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Registry Population: Scoped for This Run Only: 7 (1.40%) ?
$ Estimated Value (12 Month Change): -4.74% Analyzing 5,286 Sales ?