Lorsa 8FB
Description
The Lorsa 8FB is an only in details modified successor of the caliber Lorsa 8FA, so it’s a rather large form movement for ladies' watches, which beats with 21600 A/h.
It probably dates from the late 1970ies or early 1980ies.
Lorsa 8FB dial side
The only difference to the Lorsa 8FA. On the caliber 8FB, there’s an additional surrounding around the holes. Everything else remains the same.
Timegrapher result
The specimen shown here is NOS and unregulated, but might have sat for 30-40 years in the drawer. Nevertheless, the timegrapher rates are mostly very will, except on 9O, which cannot be explained:| horizontal positions | |||
|---|---|---|---|
| dial up | +10 s/d | 285° | 1.9ms |
| dial down | +4 s/d | 274° | 1.9ms |
| vertical positions | |||
| crown right (12 up) | +1 s/d | 240° | 1.6ms |
| crown up (3 up) | +20 s/d | 230° | 2.3ms |
| crown left (6 up) | -18 s/d | 231° | 2.6ms |
| crown down (9 up) | -85 s/d | 239° | 2.0ms |
Technical data
| Manufacturer: | Lorsa |
| Caliber: | 8FB |
| Size: | 6 3/4 x 8''' (measured: 15,2 x 17,9mm) |
| A/h: | 21600 |
| lift angle: | 52° |
| Number of jewels: | 17 |
| Escapement: | Pallet lever |
| Balance types: |
Nickel anular balance |
| Shock protection(s): |
Rufa-Anti-Shock |
| Balance bearing / direction hairspring: | Counterclockwise |
| Moveable stud: | yes |
| Adjust mechanism: | Hairspring key |
| Construction: |
|
| Construction type: | solid construction |
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 6 hole(s) |
| Inventory number: | 17010 |
Usage gallery
Pallas Ormo ladies' watch