Longines 18.90M
Mechanical
c. 1914
No photos yet
Notes
1914-
open face calibre
bimetallic screw balance
options: Beguet hairspring, Reed's regulator
early two-section regulator for coarse and fine adjustment
Dimensions
| Width | 39 lignes (87.98 mm) |
|---|---|
| Height | 3.8 mm |
| Stem height | — |
| Hands (H × M × S) | 1.58 × 0.71 × 0.25 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 32 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR4351-T |
|---|---|
| Height | 1.5 mm |
| Thickness | 0.2 mm |
| Length | 440 mm |
| Barrel diameter | 16 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Longines |
| Year | c. 1914 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions