Pocket Watch Database

From the American Horology Archive:
Waltham Grade Martyn Square Pocket Watch

American Waltham Watch Co.

Grade: Martyn Square

Manufacturer: Waltham
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 901281
Grade: Martyn Square
Model: 1857
Estimated Production Date: March 1876 - May 1876
Run Quantity: 100
Grade/Model Run: 42 of 108
Grade/Model Total Production: 7,960
Size: 18s
Jewels: 7j
Movement Configuration: Adaptable
Movement Finish: Gilt
Movement Setting: Key
Plate: Full Plate
Balance Type: Solid
Balance Material: Steel
Adjusted: No
Railroad Grade: No
Case: Various
Run ID: 6233.G72.18S5369.181857M5147.O5991.K5991.7J836
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: v52.400
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
21.25
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
19.34
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.021%

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Waltham Grade Martyn Square Pocket Watch