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Ronda 7121
Ligne: 9.75'''
Jewels: 15
Frequency: 18000 vph
Type: Manual Wind
Period used: 1931-1938
Diameter: 21.7 mm
The Ronda 7121 watch movement is a manual wind mechanism with sub-second functionality. It was in use between the years 1931 and 1938.
The Ronda 7121 features the following functions:
- Manual Winding
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 2361 | Ordinary/None | Buy staff |
| 2362 | Shock Resist | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.40 x 0.100 x 300 x 9.0 mm | GR3664 | Manual | Buy mainspring |
| 1.40 x 0.095 x 300 x 8.5 mm | GR3650 | Manual | Buy mainspring |
| 1.35 x 0.090 x 250 x 8.0 mm | Manual | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| MAINSPRING 1.40-.10-300 9 | MS-511K | GR 3664 | Buy part |
| PALLET ARBOR | 72S/57P | 714/PES 90 | Buy part |
| ROLLER 180X80X36 | 82S/41R | Buy part | |
| ROLLER, INCABLOC 180X80X36 | 82S/148R | 730/AUR 18 | Buy part |
| STAFF | 100/704 | Buy part | |
| STEM | 200/786F | Buy part |
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