Osco 70

Osco 70 | 17jewels.info - The Movement Archive

Osco 70


The Osco 70 is an unusually constructed ladies' watch form movement.

Unlike compareable movements, the balance is located at “6”, while at “12”, a rather large plate holds the mainspring barrel and the minute hand.

Technically, the reason might be, that this movement does not use a yoke winding system with safety catch on the movement side, but instead, it chose the (cheaper) rocking bar winding system with click sprint on the dial side.

The remaining construction is pretty basic with shock protected screw balance, plallet lever escapement and an anchor wheel, which has got one cap jewel at the movement side.

Osco 70: Osco 70 dial side

Osco 70 dial side

Technical data

Size:5 1/4''' (measured: 12,9 x 18,9mm)
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): Rufarex
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Hairspring key
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel, mainspring barrel
Winding mechanism:rocking bar winding system
Setting lever spring:2 hole(s)
References: Flume: 1957 48

Usage gallery

Osco 70: Para Parat ladies' watch  (dial only)

Para Parat ladies' watch (dial only)