Ronda 4220.B caliber vs Ronda 505 caliber: specs compared
Updated 05 September 2026.
9
specs differ
Ronda 4220.B caliber and Ronda 505 caliber differ on 9 specs: size, casing diameter, movement height, jewels, winding, calendar / layout.
| Spec | Ronda 4220.B caliber | Ronda 505 caliber |
|---|---|---|
| Maker | Ronda | Ronda |
| Size | 12 1/2 ligne | 11 1/2 ligne |
| Casing diameter | 28.00 mm | 25.60 mm |
| Movement height | 4.40 mm | 3.10 mm |
| Frequency | 32,768 Hz quartz | 32,768 Hz quartz |
| Jewels | 7 | 1 |
| Winding | quartz, battery cell | quartz, battery 371 (SR920SW) |
| Calendar / layout | centre seconds, date at 3 | centre seconds, date at 3, small seconds sub-variant |
| Hand fitting | hour / minute / second | hour 1.50 / minute 0.90 / second 0.20 mm (bore) |
| Stem | Ronda 4000-series stem | Ronda 500-series stem |
| Power reserve | battery, up to 54 months | battery 371, up to 45 months |
Questions and answers
How do Ronda 4220.B caliber and Ronda 505 caliber compare?
Ronda 4220.B caliber and Ronda 505 caliber differ on 9 specs: size, casing diameter, movement height, jewels, winding, calendar / layout.