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Return To ShopThe Gruen 156D is an automatic watch movement, belonging to the first calibre family with bidirectional rotor winding, which was introduced in 1942. It offers a sweep second function and is compatible with an optional Reed's regulator. Not much is known about the specific differences between the 690, 691, 696, and 698 calibre variations within this series.
The Gruen 156D features the following functions:
Dimensions | GR Reference # | End Type | Buy |
---|---|---|---|
1.45 x 0.110 x 340 x 10.0 mm | GR3984X | Auto | Buy mainspring |
1.40 x 0.110 x 350 x 10.5 mm | Auto | Buy mainspring |
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