Felsa 693 Bidynator
Mechanical
c. 1942
Self-winding (rotor)
Date
Day
No photos yet
Notes
1942-
first calibre family (series Felsa 690...699) with bidirectional rotor winding (cf. Felsa 690)
option: Reed's regulator (cf. Felsa 690)
option: Incastar regulator (Fig.3, 4):
The only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length. No isochronism error by the gap between the regulator pins.
Dimensions
| Width | 26 lignes (58.65 mm) |
|---|---|
| Height | 7 mm |
| Stem height | 2.75 mm |
| Hands (H × M × S) | 2.2 × 1.4 × 0.9 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 44 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | Yes |
| Day | Yes |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf1044 |
|---|---|
| Height | 10.5 mm |
| Thickness | 0.11 mm |
| Length | 350 mm |
| Barrel diameter | 1.4 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Felsa |
| Year | c. 1942 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions