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The company's historic 19th-century manufacturing facilities in Waltham, Massachusetts have been preserved as the American Waltham Watch Company Historic District.
In 1850, at Roxbury, Massachusetts, David Davis, Edward Howard, and Aaron Lufkin Dennison formed the company that would later become the Waltham Watch Company.
Serial number records are available for many of the old pocket watch companies like AM Waltham, Elgin, South Bend etc. The number you need is the serial number stamped on the MOVEMENT (i.e the inner workings).
It will NOT tell you the actual date the watch was acquired...
many watches spent years in warehouses before being sold... If there are some letters incoroporated in the serial number (common with Hamilton and Elgin) your watch was probably made AFTER the last date on the chart.
The Elgin and Hamilton were dated by serial number, while the Gruen was dated by an inscription on the back. In the 1930's there was a style change from highly engraved cases to smoother cleaner lines.
The "New Haven" was dated by looking at the style of the watch. Notice that the watches from the early 1930's still have engraved cases.
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