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One unusual feature of this watch was the heat disk on the back of the case to prevent the heat from the wearer's wrist from causing the oil in the watch to drip out of the jewel holes. Depollier ads claim that the US Army Signal Corps used the case to protect watch movement stores in long-term storage. The gasketed and spring-loaded screw-down ...
By 1890, the company was producing quality watches, and introduced the first size 16, 23 jewel movement made in America. In 1923, the two businesses merged to become the Dueber-Hampden Watch Company. In 1925, John Dueber sold the company to Walter Vrettman. In 1927, falling sales led to the company going into receivership.
Many of these watches featured a new 207 movement, 12/0-size with 17 jewels (of which only 40,000 were made) and included such sleek designs as the Futura, Chesterfield, Wentworth, Andover, and the 14kt Rockliffe. Many of these are very similar to watches made at the time by the Hamilton Watch Company.
The Hamilton Watch Company was housed on a 13-acre (53,000 m 2) complex in Lancaster. Hamilton took possession of Aurora Watch Company's machinery shortly after incorporation. [citation needed] The first watch made under the Hamilton name was an 18-size 17-jewel pocket watch in 1893.
ETA Mechanical movements Caliber Product Line Winding Diameter () Height () Jewels Frequency Running time () VPH Hz; 2671 [1]: Mecaline automatic 17.2 4.8 25
205.711 (15 jeweled movement used only by Swatch Watch for a variety of its fashion watches) 205.911 (the most commonly available movement having 17 jewels and often ordered in gold plating) 205.914 (no information available from ETA) 205.961 (a 205.911 with the addition of a GMT hand)
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