Ronda 502
Factory specs
- Caliber
- 502
- Made in
- Switzerland
- Jewels
- 1
- Accuracy
- —
- Battery life
- 3.75 years
- Diameter
- 23.3 mm
- Height
- 3 mm
- Functions
- Hours, Minutes
- Same family
- Ronda 503
Two-hand quartz from Ronda's 10½-ligne powertech 500 line (the 503 adds a seconds hand, the 505 a date). Ronda's caliber page and datasheet serve a bot check, so the figures are from the datasheet text as indexed by a web search on 2026-10-25: 10½''', 3.00mm high, two hands, 45 months' standard battery life (60 months with a high-capacity cell; recorded as 3.75 years), typical consumption 1.28 μA, 0-50 °C. Ronda says the 10½''' powertech versions share the same dimensions and its 503 sheet gives a 23.30mm casing diameter, which is recorded here. Accuracy was not seen. Cincinnati Watch Company, which uses it in the Ladies Union Terminal, describes its "Ronda 502 Top Grade (Swiss Made)" as a repairable metal quartz movement with 1 jewel, stop seconds and "3-year battery life"; the jewel count is from that listing.
Watches with the Ronda 502
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 Cincinnati Watch Company Ladies Union Terminal |
$325 | Ronda 502 | 26.5 | 9.5 | Acrylic | — |