DuRoWe 870 / Timex M84
Description
This movement was the second Laco/Timex electromechanical movement, which was used for example in Timex-Electric watches from 1965 on.
Its balance coil was switched by a thin contact, which used to wear out rather fast, and so, only four years later, its successor, Caliber 887 (M87) replaced it.
The second hand jumps in one-second steps, that means, that every sixth balance amplitude, it is driven a bit. Its direct relative, Caliber 880/881 (which uses the same main plate, as you can see on the photo) also features a date mechanism.
In Timex watches, this movement was named M84.
Technical data
| Manufacturer: | DuRoWe |
| Caliber: | 870 |
| Size: | 13 1/2''' |
| A/h: | 21600 |
| Number of jewels: | 7 |
| Escapement: | Electric |
| Shock protection(s): | Duro-Swing |
| Balance bearing / direction hairspring: | Bridge |
| Moveable stud: | yes |
| Adjust mechanism: | Long regulator arm |
| Features: |
|
| Production period: | 1965 - 1968 |
| References: | Flume: K3 310 |
| Mentioning in literature (years): | 1969 |
Links
Other movements from DuRoWe
- DuRoWe 50
- DuRoWe 55
- DuRoWe 61 / Kienzle 070/27
- DuRoWe 70
- DuRoWe 72
- DuRoWe 75 (INT)
- DuRoWe 89
- DuRoWe 202
- DuRoWe 260
- DuRoWe 270
- DuRoWe 275
- DuRoWe 322
- DuRoWe 410
- DuRoWe 422
- DuRoWe 435
- DuRoWe 450 / Kienzle 071/17
- DuRoWe 552
- DuRoWe 585
- DuRoWe 590/1
- DuRoWe 753
- DuRoWe 861 / Timex M67
- DuRoWe 900 / Timex M82
- DuRoWe 1032
- DuRoWe 1055
- DuRoWe 1132
- DuRoWe 1162
- DuRoWe 1285
- DuRoWe 1977-4 (INT)
- DuRoWe 1980 (INT)
- DuRoWe 7410/2 (INT)
- DuRoWe 7420/2 (INT)
- DuRoWe 7422/2 (INT) / Dugena 2113
- DuRoWe 7522/4 (INT)
- DuRoWe 7525 (INT)