RGM Watch Company Caliber 20
RGM's second in-house movement: a tonneau-shaped hand-wound caliber with a motor-barrel winding system RGM says wasn't used in series production for over 50 years.
2 references
| Reference | Variant | Years | Dial | Size |
|---|---|---|---|---|
| Caliber 20 — 18K Rose Gold | Not recorded | Not recorded | 42.5 mm | |
| Caliber 20 — Stainless Steel | Not recorded | Not recorded | 42.5 mm |