The Ronda 515.24H combines battery-powered quartz timekeeping with a separate 24-hour GMT hand. It suits a watch intended to keep a second time zone visible without daily winding.
Specifications at a glance
| Manufacturer / caliber | Ronda / 515.24H |
|---|---|
| Movement type | Analog quartz GMT |
| Manufacturer / origin note | Swiss manufacturer; Swiss Made and Swiss Parts versions are offered. A movement designation does not establish the origin of the complete watch. |
| Functions | Hours, minutes, seconds, date, 24-hour GMT hand with quick correction |
| Power source | Battery |
| Hand winding | Not applicable |
| Stop-seconds (hacking) | Yes; seconds stop in the time-setting position |
| Published accuracy | −10 / +20 seconds per month |
| Running time / battery life | 45 months with the standard battery; actual life varies |
| Jewels | 1 |
| Movement size | 11½ lignes; 26.00 mm overall diameter; 25.60 mm case-fitting diameter |
| Movement height | 3.00 mm; 3.25 mm over the standard battery |
| Battery | 371 / SR920SW, 1.55 V |
What this means on your wrist
The additional hand reads against a 24-hour scale, making a second time zone visible alongside local time. The GMT hand has its own quick correction. This is different from a travel GMT that lets you jump the local hour hand independently.
Quartz convenience means you can leave the watch off your wrist and return to it without winding it. Battery life is a manufacturer estimate, not a countdown from your purchase date.
Ownership and compatibility
Follow the manufacturer’s setting instructions and the finished watch’s crown instructions. Have battery replacement and any required sealing checks performed by a qualified watchmaker.
For a commission, movement diameter alone does not establish compatibility. The case, stem position, dial, date opening, hands, and clearances must work together.
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Manufacturer sources
Manufacturer specifications checked October 6, 2026. These are movement specifications, not a test report or a guarantee for an individual finished watch. Case size, water resistance, and materials are specified on each watch’s product page.