Longines 20.52
Mechanical
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Notes
open face calibre
bimetallic screw balance with 4 adjustment screws
ratchet on dial side, click-unlocking from rear side by marked screw head, crown mechanism with rocker bar
straight long lever (ligne angulaire) with counterweight and hidden pallets
two-section regulator for coarse and fine adjustment (cf. Longines 18 49)
Dimensions
| Width | 43.55 lignes (98.24 mm) |
|---|---|
| Height | 7.5 mm |
| Stem height | — |
| Hands (H × M × S) | 1.75 × 0.65 × 0.28 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 36 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf3998 |
|---|---|
| Height | 17 mm |
| Thickness | 0.21 mm |
| Length | 490 mm |
| Barrel diameter | 2.7 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Longines |
| Year | — |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions