Enter the serial number from the pocket watch movement below. Do not use the case number. Serial Number Tip

Pocket Watch Serial Number Lookup - Hamilton, South Bend, Illinois, Rockford, Waltham & Elgin Pocket Watches
  Serial Number:
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Elgin Pocket Watch Regulators

These are known regulators used on Elgin watch movements. The regulator is used to adjust the balance wheel's rate of oscillation in order to improve accuracy of the watch. Several varieties of watch regulators were used in movement designs, most of which were patented, often called "Patent Regulators." The best regulators offer extreme precision while adjusting the rate of oscillation. A patent regulator was often an indicator of quality.

Inventor:Joseph Bosley
Patent Date:c. 1755
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Inventor:Charles S. Moseley and George Hunter
Patent Date:Nov 17 1874
Patent Number:157021
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Inventor:Webster C. Ball
Patent Date:Aug 18 1896
Patent Number:565955
Name:Elgin "Old Style"
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Image Credit:Jerry Treiman