Otero 901
Mechanical
Self-winding (rotor)
Date
No photos yet
Notes
ball-bearing rotor
sophisticated excenter self-winding mechanism with just one gear stage (Fig.5)
This principle is known as magic lever from Seiko automatics around 1970 (cf. Seiko 6118A), but was already applied in the first Otero automatics from the 50s (cf. Otero 48).
All parts of the automatic module are held together with just two screws (Fig.5).
About the mainsprings of the generation Otero 800...907 varying specs were published, but the differences are too small to be important.
Dimensions
| Width | 25.6 lignes (57.75 mm) |
|---|---|
| Height | 5.7 mm |
| Stem height | 1.6 mm |
| Hands (H × M × S) | 1.5 × 0.9 × 0.21 mm |
Technical data
| Beat rate | 21,600 vph (3 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 43 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | Yes (quick set) |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 9.5 mm |
| Thickness | 0.11 mm |
| Length | — |
| Barrel diameter | 1.2 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Otero |
| Year | — |
| Family | — |
| Clone of | — |
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Documents
None
Updated 7 days ago · 0 revisions