Dating a waltham watch movement

Pictured below is a nice example of the 18s Keystone Standard Dust Proof.

The Keystone Standard Watch Company should not be confused with the Keystone Watch Case Company, which purchased the rights to the "E.

This is probably the most common question watch collectors have.

Sometimes it is easy to answer, and sometimes it is impossible.

Waltham Watch Company was the first watchmaker to mass-produce watch movements on an assembly line.

This had the combined effects of increasing productivity and lowering the prices of Waltham’s watches to its customers.

Close The watches displayed on this WALTHAM WATCH COMPANY SA official website are the only available at selected Exclusive Boutiques.

There are several ways to get an idea of when your watch was made.

Almost 9000 Lancaster watch movements had been completed but not sold when Bitner assumed control of the company, and these were sold by Keystone Standard under the Lancaster name.

Keystone continued to produce a relatively small number or watches, about 48,000 in total, until their sale to the Hamilton Watch Company in 1891.

Founded in 1850 by watchmakers Aaron Dennison, Edward Howard, and David Davis as the American Watch Company, the firm’s earliest watch movements were stamped with the words "Howard, Davis, and Dennison – Boston," even though the company was actually based in nearby Roxbury.

By 1851, their manufacturing processes perfected, the partners renamed their firm the American Horologe Company.

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