
The Unitas 156 watch movement, produced from 1975 to 1977, showcases trade marks such as Astrolon and Sytal. Notably, this movement is predominantly constructed using self-lubricating plastic materials. It incorporates an indirect minute hand friction clutch on the barrel. This movement offers a range of manual wind functions, including a sweep second hand, day setting from 23:15-0:45h, and date setting from 23-24h.
The Unitas 156 features the following functions:
| Ronda Reference # | Shock System | Buy |
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| Dimensions | GR Reference # | End Type | Buy |
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| 1.10 x 0.105 x 310 x 9.5 mm | Manual | Buy mainspring |
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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| Part Description | Reference # | Alternate | Buy |
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