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From the American Horology Archive:
American Waltham Watch Co.

Grade: Crescent St.

Manufacturer: Waltham ?
Manufacturer Location: Waltham, Massachusetts ?
Movement Serial Number: 672441 ?
Grade: Crescent St. ?
Variation: Push Lever ?
Model: 1870 ?
Estimated Production Year: 1873 ?
Run Quantity: 2,000 ?
Grade/Model Run: 7 of 22 ?
Grade/Model Total Production: 17,880 ?
Variant Est. Production: 5,000 (18S-M1870-HGL-ADJ) ?
Size: 18s ?
Jewels: 15j ?
Movement Configuration: Hunting ?
Movement Finish: Gilt ?
Movement Setting: Lever ?
Plate: Full Plate ?
Adjusted: Yes ?
Adjusted to Position: Yes ?
Case: Various ?
Run ID: 5236.G17.18S4788.181870M17.H19.L15.15J1243 ?
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 ?
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Registry Population: Scoped for This Run Only: 15 (0.75%) ?