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The Girard Perregaux 09.1 is an open face calibre watch movement that offers optional Breguet hairspring and varying bridge shapes. It may possibly feature a left-handed ratchet-wheel screw, although further information is not known regarding its differences amidst calibres 231, 235, 239, 243, 249, 255, 259, 265, 271, 277, 447, 449, 471, 477, and 508. These calibre designations are likely catalog designations representing the various bridge shapes. The Girard Perregaux 09.1 movement, utilized around 1940, implements stem-winding and setting functionalities, along with a sub-second feature.
The Girard Perregaux 09.1 features the following functions:
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.10 x 0.210 x 490 x 17.0 mm | Manual | Buy mainspring | |
| 2.10 x 0.210 x 480 x 16.0 mm | GR6106 | Manual | Buy mainspring |
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
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