Pocket Watch Database
https://pocketwatchdatabase.com/search/result/waltham/520525
Access Date: January 30, 2023
From the American Horology Archive:

American Waltham Watch Co.
Grade: Crescent St.
Manufacturer: | Waltham | ![]() |
Manufacturer Location: | Waltham, Massachusetts | ![]() |
Movement Serial Number: | 520525 | ![]() |
Grade: | Crescent St. | ![]() |
Model: | 1870 | ![]() |
Estimated Production Date: | October 1870 - May 1, 1871 | ![]() |
Run Quantity: | 700 | ![]() |
Grade/Model Total Production: | 17,880 | ![]() |
Size: | 18s | ![]() |
Jewels: | 15j | ![]() |
Movement Configuration: | Adaptable | ![]() |
Movement Finish: | Gilt | ![]() |
Movement Setting: | Key | ![]() |
Plate: | Full Plate | ![]() |
Adjusted: | Yes | ![]() |
Adjusted to Position: | Yes | ![]() |
Data Research: |
c.1900 Waltham Factory Ledgers 1954 Waltham "Gray Book" List |
![]() |
Case: | Various | ![]() |
Registry Population: | 4 (0.57%) | ![]() |
Database Version: | v49.716 | ![]() |
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
---|---|---|---|---|---|
1 | 520340 | #40 | Marketplace | February 16, 2020 | |
2 | 520403 | #103 | Collection | December 11, 2022 | |
3 |
![]() Image Credit: 1dueberincanton |
520525 | #225 | Collection | May 18, 2021 |
4 | 520900 | #600 | Collection | November 14, 2015 | |
Standard Deviation of Known Examples: 250.72 (Expected: 202.22, Δ48.50/6.93%) |
Help Us Help Others By Improving the Database:
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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.
Rcardkidz 2788 · December 5, 2022
Serial Number 520356 was reported as accurate.

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