Longines 993.1
Mechanical
c. 1977
Self-winding (rotor)
No photos yet
Notes
1977-
When introducted in 1977, the 990 with all features was the thinnest automatic movement with date and sweep second; even in 2003 it is only underscored by movements without date and/or sweep second.
micrometer regulator
two serially coupled barrels, one with fixed spring, one with slip spring
equivalent to Lemania 8810...
Dimensions
| Width | 25.6 lignes (57.75 mm) |
|---|---|
| Height | 2.95 mm |
| Stem height | 0.6 mm |
| Hands (H × M × S) | 1.6 × 1.2 × ? mm |
Technical data
| Beat rate | 28,800 vph (4 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 40 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | — |
| Thickness | — |
| Length | — |
| Barrel diameter | — |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Longines |
| Year | c. 1977 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions