Pocket Watch Database

From the American Horology Archive:
Waltham Grade P.S. Bartlett Pocket Watch

American Waltham Watch Co.

Grade: P.S. Bartlett

Manufacturer: Waltham
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 431628
Grade: P.S. Bartlett
Model: 1857
Estimated Production Date: January 1870 - February 1, 1870
Run Quantity: 100
Total Production: 293,259
Size: 18s
Jewels: 11j
Movement Configuration: Adaptable
Movement Finish: Gilt
Movement Setting: Key
Plate: Full Plate
Balance Type: Solid
Balance Material: Steel
Adjusted: No
Railroad Grade: No
Data Research: c.1900 Waltham Factory Ledgers
1954 Waltham "Gray Book" List
Case: Various
Registry Population: 1 (1.00%)
Database Version: v49.391

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 431628 #28 Collection July 06, 2015
Standard Deviation of Known Examples: 0.00 (Expected: 29.01, Δ29.01/29.01%)

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Data Verification Reports

431601
Verification Serial Map
431700

pwdmbj Supporter 513 ยท August 26, 2021

Serial Number 431680 was reported as accurate.

Waltham Grade P.S. Bartlett Pocket Watch