Ronda 7021
Mechanical
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Notes
ratchet on dial side, crown mechanism with rocker bar
shock protection by elastical spiral-shaped balance spokes
strange: train and hand gear separately driven by the barrel (cf. Ronda 9011)
Dimensions
| Width | 23.3 lignes (52.56 mm) |
|---|---|
| Height | 4 mm |
| Stem height | 1 mm |
| Hands (H × M × S) | 1.8 × 1.3 × ? mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 37 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf1043 |
|---|---|
| Height | 10 mm |
| Thickness | 0.11 mm |
| Length | 320 mm |
| Barrel diameter | 1.4 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Ronda |
| Year | — |
| Family | — |
| Clone of | — |
Related calibers
Documents
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Updated 7 days ago · 0 revisions