
The Benrus EG 1S5 watch movement, produced from 1960 onwards, features an excenter regulator for the stud carrier and a patented double-excenter winding mechanism with jewelled rollers. Its jewel-bearing rotor ensures smooth operation. Additionally, the inclusion of an intermediate wheel between the minute pinion and the rest of the train allows for a large balance and a low-profile design without compromising durability. This layout also grants the flexibility to position the seconds wheel in either the center or as a sub-second function, requiring no further modifications. The movement is equipped with automatic winding and utilizes a sweep second hand.
The Benrus EG 1S5 features the following functions:
| Ronda Reference # | Shock System | Buy |
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| Dimensions | GR Reference # | End Type | Buy |
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| 1.40 x 0.110 x 10.5 mm | Auto | 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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