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Osco 66D

 
Osco 66D |

Osco 66D

Description

The Osco 66D is a well equipped movement of german production: It contains a screw balance (or a golden toned ring balance in later issues), which is beared in a Trishock-like shock protection system, a direct driven center second indication and a date display by a date wheel. Only the rocking bar winding mechanism is a tribute to the economical fabrication of this movement.

This movement uses a number of cap jewels on the escapement and escapement wheel (on the dial side).

Osco 66D: version with screw-less balance

version with screw-less balance

Osco 66D: Osco 66D dial side

Osco 66D dial side

Osco 66D: Zifferblattseite without date disc

Zifferblattseite without date disc

Technical data

Manufacturer:Osco
Caliber:66D
Size:10 1/2'''
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types:Glucydur screw balance
Nickel anular balance
Shock protection(s):?
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Winding mechanism:rocking bar winding system
Setting lever spring:3 holes
Features:
  • SCD (direct center seconds)
  • QG (date indication (aperture))
References:Flume: 1957 36
Hint: The jewel count, the types of balances used, and the shock protections employed refer only to the specimens held in the archive and are therefore not relevant for the precise identification of the movement.

Usage gallery

Osco 66D: Osco Parat ladies' watch

Osco Parat ladies' watch

Osco 66D: Bergana gents watch

Bergana gents watch

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