Longines 989.2
Mechanical
c. 1977
Self-winding (rotor)
Hacking
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
Instead of the date ring, an hour angle disc is mounted, which is operated in the crown position for quickset date.
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 × 0.25 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 | Yes |
| 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