Matching Serial Numbers? Last week, I posted a c.1918 Waltham Duo-Tone P.S. Bartlett that featured unusual gilt-damaskeened upper plates paired with a nickel pillar plate and balance cock. This spurred.
Waltham P.S. Bartlett #22295427 with Duo-Tone Plates For a short time in the late 1910s, the American Waltham Watch Company produced 16-Size P.S. Bartlett and No. 620 movements with duo-tone.
Pictured: “Watch Bridge” U.S. Patent #D18722 In a move that was rather uncommon for watch manufacturers at the time, the Non-Magnetic Watch Company of America applied for a design patent.
Pictured: Deconstructed Parts from a Grade No. 73 Non-Magnetic Watch Co. of America Movement, #65426 An inspection of the Badollet Model sold by the Non-Magnetic Watch Company reveals the movement.
Pictured: Grade 275 Burlington Movement, Courtesy of PWDB User v3ngence. When the Burlington Watch Company transitioned to exclusively selling 21-Jewel watches in 1916, the previous generation 12-Size Grade 274 was.
Pictured: Grade 107 Burlington Movement #3529031, c.1919. The Grade 107 Burlington was introduced by the Burlington Watch Company in October 1916. The movement featured premium traits such as a steel.
