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Enter the serial number from the pocket watch movement below. Do not use the case number. Tips for looking up your watch

How to Find Info About Your Pocket Watch

The Pocket Watch Database has compiled data covering the major American pocket watch manufacturers and created an easy way to find information using the serial number on the watch movement. Here are a few tips to find information about your pocket watch:

  1. Always input the serial number from the pocket watch movement (the "guts" of the watch).
  2. Never use the serial number from the case or any other part.
  3. If the serial number includes a letter, enter it along with the number when using the lookup feature.
  4. Many pocket watch case backs screw off. Others may require a dull wide blade to pry or pop the cover. Be careful not to scratch or damage the movement.
  5. Always select the correct manufacturer, which is usually stamped on the watch movement.
  6. If the manufacturer is not listed on the site, you may have a "private label" watch or it may not be American-made.
  7. Understand that many companies did not keep accurate or complete records. As a result, information displayed on this site may have inaccuracies. This is to be expected, and we have included an option to report inaccurate information on the result pages so the database can be continually improved.
Pocket Watch Serial Number Lookup - Hamilton, South Bend, Illinois, Rockford, Waltham & Elgin Pocket Watches
  Serial Number:
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Grade: 940

For Special RR Service

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 662528
Grade: 940
Model: 1
To Finishing Dept: Feb 8, 1910
Run Quantity: 2,000
Total Production: 210,596
Size: 18s
Jewels: 21j
Jewel Material: Ruby
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Damaskeened
Movement Inlay Color: Gilt
Movement Setting: Lever
Plate: Full Plate
Double Roller: Yes
Barrel: Motor
Regulator: Goldthwait
Hairspring: Breguet
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
U.S. Patents: 832672, 427072
Data Research: 1953 Hamilton Serial List
Research Note: #663058 Reported as Marked "For Special RR Service"
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Data Confidence Rating:

Verifications & Observations

662001
Verification Serial Map
664000
  • February 17, 2019:
    Serial Number 663747 was reported as accurate
  • December 17, 2018:
    Serial Number 663595 was reported as accurate
  • March 26, 2018:
    Serial Number 663528 was reported as accurate
  • January 8, 2018:
    Serial Number 663027 was reported as accurate
  • July 29, 2017:
    Serial Number 663341 was reported as accurate
  • July 17, 2017:
    Serial Number 662520 was reported as accurate
  • June 28, 2017:
    Serial Number 663187 was reported as accurate
  • June 10, 2017:
    Serial Number 662520 was reported as accurate
  • August 8, 2016:
    Serial Number 662045 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • January 31, 2016:
    Serial Number 663571 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • July 30, 2015:
    Serial Number 663058 was reported as inaccurate
    Note: plus two tone movement signed "for special RR
    service"
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • April 16, 2015:
    Serial Number 662631 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • April 17, 2014:
    Serial Number 662681 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • April 9, 2014:
    Serial Number 663032 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
  • August 30, 2013:
    Serial Number 663132 was reported as accurate
    Changes since this report was submitted:
    Double Roller changed from No to Yes
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