Pocket Watch Database
https://pocketwatchdatabase.com/search/result/hamilton/S621
Access Date: May 07, 2025
"S621" could possibly indicate the grade of the watch and not the serial number of your movement. Serial numbers are usually more than a few digits.
From the American Horology Archive:

Hamilton Watch Co.
Grade: 950B
Manufacturer: | Hamilton |
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Manufacturer Location: | Lancaster, Pennsylvania |
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Movement Serial Number: | S621 |
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Grade: | 950B |
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Model: | 6 |
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Estimated Production Year: | Login to View |
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Run Quantity: | Login to View |
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Grade/Model Run: | Login to View |
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Grade/Model Total Production: | Login to View |
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Size: | 16s |
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Jewels: | 23j |
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Movement Configuration: | Openface |
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Movement Finish: | Nickel |
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Movement Setting: | Lever |
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Plate: | Bridge Plate |
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Bridge Type: | Center |
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Train Material: | Login to View |
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Adjusted: | Login to View |
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Adjusted to Position: | Login to View |
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Adjusted # of Positions: | Login to View |
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Adjusted to Temperature: | Login to View |
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Adjusted to Isochronism: | Login to View |
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Railroad Grade: | Login to View |
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Dial Feet Locations: | Login to View |
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Case: | Various | ![]() |
Run ID: | 2617.G2.16S1511.166M2.O1828.L1513.23J101 | ![]() |
Data Research: |
1953 Hamilton Serial List |
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Database Version: | v52.645 | ![]() |
Advanced Metrics | ||
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Registry Population: Scoped for This Run Only | 13 (1.18%) | ![]() |
$ Estimated Value (12 Month Change): | -1.80% Analyzing 888 Sales | ![]() |
12 Additional Member-Only Data Points Available
The following information is unlocked with a free account:
Estimated Production Year, Run Quantity, Grade/Model Run, Grade/Model Total Production, Train Material, Adjustments, Adjusted to Position, Positional Adjustments, Temperature Adjustments, Isochronism Adjustments, Railroad Grade Designation, Dial Feet Locations
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
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There are 13 watches in the population registry for this run with 5 images.
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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.
cjbrem Supporter 1073 · December 4, 2023
Serial Number S942 was reported as accurate.
Thaigr 6 · July 28, 2020
Serial Number S293 was reported as accurate.
densgems 6 · May 8, 2020
Serial Number S499 was reported as accurate.
antdale83 2 · March 1, 2018
Serial Number S575 was reported as accurate.
Jawilson 1 · January 10, 2017
Serial Number S499 was reported as accurate.
Bulldog1964 7 · September 22, 2016
Serial Number S067 was reported as accurate.
bwalder 137 · December 30, 2015
Serial Number S976 was reported as accurate.
Gasperoff Supporter 727 · November 18, 2015
Serial Number S759 was reported as accurate.
walter2 56 · April 25, 2015
Serial Number S264 was reported as accurate.
axp950b 2 · March 20, 2014
Serial Number S856 was reported as accurate.
rocket00 236 · January 29, 2014
Serial Number S856 was reported as accurate.
jbrad92 2 · July 25, 2013
Serial Number S033 was reported as accurate.
eparso 59 · July 16, 2013
Serial Number S078 was reported as accurate.

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