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).
version with screw-less balance
Osco 66D dial side
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: |
|
| Winding mechanism: | rocking bar winding system |
| Setting lever spring: | 3 hole(s) |
| Features: |
|
| References: |
Flume: 1957 36 |
Usage gallery
Osco Parat ladies' watch
Bergana gents watch