Pierce 861(AUT)
Mechanical
c. 1933
Self-winding (rotor)
No photos yet
Notes
1933-
automatic with linearly sliding weight
Through the aperture in the automatic bridge the movement can be wound with a special key for service purpose.
later samples with beveled base plate and no separate slide bearing on the balance cock
Dimensions
| Width | — |
|---|---|
| Height | 5.1 mm |
| Stem height | — |
| Hands (H × M × S) | 1.28 × 0.6 × 0.18 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 39 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf924 |
|---|---|
| Height | 7 mm |
| Thickness | 0.08 mm |
| Length | 220 mm |
| Barrel diameter | 1.35 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Pierce |
| Year | c. 1933 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions