Ronda 505 caliber vs Ronda 6203.B caliber: specs compared
Updated 05 September 2026.
8
specs differ
Ronda 505 caliber and Ronda 6203.B caliber differ on 8 specs: casing diameter, movement height, jewels, winding, calendar / layout, hand fitting.
| Spec | Ronda 505 caliber | Ronda 6203.B caliber |
|---|---|---|
| Maker | Ronda | Ronda |
| Size | 11 1/2 ligne | 11 1/2 ligne |
| Casing diameter | 25.60 mm | 26.00 mm |
| Movement height | 3.10 mm | 3.30 mm |
| Frequency | 32,768 Hz quartz | 32,768 Hz quartz |
| Jewels | 1 | 1 or 5 |
| Winding | quartz, battery 371 (SR920SW) | quartz, battery cell |
| Calendar / layout | centre seconds, date at 3, small seconds sub-variant | dual time and date at 3 |
| Hand fitting | hour 1.50 / minute 0.90 / second 0.20 mm (bore) | hour / minute / second plus 24h sub-hand |
| Stem | Ronda 500-series stem | Ronda 6000-series stem |
| Power reserve | battery 371, up to 45 months | battery |
Questions and answers
How do Ronda 505 caliber and Ronda 6203.B caliber compare?
Ronda 505 caliber and Ronda 6203.B caliber differ on 8 specs: casing diameter, movement height, jewels, winding, calendar / layout, hand fitting.