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Return To ShopThe Gruen 510SS watch movement, produced from 1941 to 1945 with fewer than 20,000 units, features a bimetallic screw balance and a Breguet hairspring. Serial numbers for this movement begin with 200,000, and later samples may be nickel- or silver-plated. It functions as a manual-wind chronograph with two sub-dials indicating 60 seconds and 30 minutes, respectively, and utilizes a pillar wheel mechanism. Additionally, it includes a sub-second function.
The Gruen 510SS features the following functions:
Dimensions | GR Reference # | End Type | Buy |
---|---|---|---|
1.20 x 0.080 x 200 x 6.5 mm | GR2868 | Manual | Buy mainspring |
1.20 x 0.080 x 190 x 6.5 mm | Manual | Buy mainspring | |
1.15 x 0.080 x 200 x 6.5 mm | GR2780 | Manual | Buy mainspring |
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