Pocket Watch Database


From the American Horology Archive:

American Waltham Watch Co.

Grade: Missing Data

Manufacturer: Waltham Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 20311122 Question Mark
Grade: Missing Data Question Mark
Model: L-7.5 Question Mark
Estimated Production Year: 1915 Question Mark
Run Quantity: 2,000 Question Mark
Grade/Model Run: 4 of 16 Question Mark
Grade/Model Total Production: 187,900 Question Mark
Size: 7.5L Question Mark
Jewels: 17j Question Mark
Movement Configuration: Hunting Question Mark
Movement Setting: Pendant Question Mark
Hairspring: Breguet Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Case: Various Question Mark
Run ID: 23102.G72.S5.M5.H7813.P8201.17J2382 Question Mark
Data Research: 1954 Waltham "Gray Book" List
NAWCC Waltham Serial Digest
Question Mark
Database Version: v52.516 Question Mark
Registry Population:
Scoped for This Run Only
1 (0.05%) Question Mark
$ Estimated Value (12 Month Change): -13.33% Analyzing 81 Sales Question Mark

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.


JerryT Waltham Expert Small Watch Expert 425 · August 10, 2021

Serial Number 20311122 was reported as inaccurate.

Note: The size was listed by Waltham as 7-1/2 lignes
Changes since this report was submitted:
Size changed from 7L to 7.5l
Factory Model changed from L-7 to L-7.5