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 "mechanism" of the watch).
  2. Never use the serial number from the case or any other part.
  3. Always select the correct manufacturer, which is usually stamped on the watch movement or dial.
  4. If the manufacturer is not listed on the site, you may have a "private label" watch or it may not be American-made.
  5. If the serial number includes a letter, enter it along with the number when using the lookup feature.
  6. 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.
  7. Consider uploading images of your watch by creating a collection account on the website. This is compeltely free and assists in promoting research in American horology.
  8. 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: No. 645

Manufacturer: Waltham
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 20040466
Grade: No. 645
Model: 1908
Estimated Production Year: 1915
Run Quantity: 1,000
Total Production: 59,300
Size: 16s
Jewels: 21j
Jewel Material: Ruby
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: 3/4 Plate
Double Roller: Yes
Barrel: Jewelled Motor
Regulator: Micrometer
Hairspring: Breguet
Pallet Jewel Material: Sapphire
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
Data Research: 1954 Waltham "Gray Book" List
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Data Confidence Rating:

Verifications & Observations

Verification Serial Map
  • June 9, 2020:
    Serial Number 20039828 was reported as accurate
  • March 6, 2020:
    Serial Number 20039874 was reported as accurate
  • March 5, 2020:
    Serial Number 20039929 was reported as accurate
  • March 13, 2018:
    Serial Number 20040446 was reported as accurate
  • October 7, 2017:
    Serial Number 20040136 was reported as inaccurate
    No further details were submitted with the report.
  • May 8, 2017:
    Serial Number 20039885 was reported as accurate
  • July 16, 2016:
    Serial Number 20040203 was reported as accurate
  • January 17, 2016:
    Serial Number 20039965 was reported as accurate
  • November 30, 2015:
    Serial Number 20040203 was reported as accurate
  • July 17, 2015:
    Serial Number 20039950 was reported as accurate
  • October 31, 2014:
    Serial Number 20040466 was reported as accurate
  • October 15, 2013:
    Serial Number 20039528 was reported as accurate
  • December 20, 2012:
    Serial Number 20039743 was reported as inaccurate
    Note: Does not say Riverside on train bridge.
    It says "21 Jewels, 645, A.W.W. CO., WALTHAM