DuRoWe 870 / Timex M84

DuRoWe 870 / Timex M84 | 17jewels.info - The Movement Archive

DuRoWe 870 / Timex M84


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

Size:13 1/2'''
Number of jewels:7
Shock protection(s): Duro-Swing
Balance bearing / direction hairspring:Bridge
Moveable stud:yes
Adjust mechanism:Long regulator arm
  • SCD (direct center seconds)
  • EL (elecromechanically powered)
Production period:1965-1968
References: Flume: K3 310
Mentioning in literature (years): 1969