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:
Need to replace a watch crystal? Use our new crystal size guide to find the proper fit.

Pocket Watch Key Sizes

Use the chart below to find the proper pocket watch key size to wind and set your early American movement. Please note the different size specifications utilized by various regions and match available keys accordingly. When in doubt, we recommend purchasing a set of keys, offering various sizes.

Pocket Watch Key Size Calculator

Carefully measure the width of your key square with a micrometer. Enter the measurement above to calculate the proper key size.

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Suggested Size:
English Square Size Key Size Indian Square Size
0.95mm 00 2.00mm
1.00mm 0 1.90mm
1.05mm 1 1.80mm
1.15mm 2 1.75mm
1.20mm 3 1.65mm
1.30mm 4 1.60mm
1.40mm 5 1.50mm
1.50mm 6 1.40mm
1.60mm 7 1.30mm
1.70mm 8 1.20mm
1.75mm 9 1.90mm
1.80mm 10 1.05mm
1.90mm 11 1.00mm
2.00mm 12 0.95mm