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Ronda watch movements

Ronda is the Swiss maker best known for its reliable quartz calibers, the movements behind a large share of affordable Swiss-made quartz watches.

Who Ronda is

Ronda is an independent Swiss movement manufacturer that specialises in quartz calibers, though it also makes mechanical movements. Its quartz movements are a standard fit in Swiss-made quartz watches across many price points.

Ronda quartz calibers are dimensioned to their own footprints and coded by a number and a series letter, such as the 515 or the chronograph 5030.D, each with a defined size and battery.

The quartz range

The 515 is a common three-hand date caliber; the 513S a slim variant; the 5030.D and 5021.D are quartz chronographs; the 4220.B, 6203.B, 6004.B, 763 and 715 cover other sizes and layouts. Each has a fixed diameter, height and battery type.

These are documented here with their exact dimensions so a failed quartz movement can be matched to the correct Ronda replacement rather than guessed at.

Replacing a Ronda movement

Because a quartz movement is defined by its footprint, its battery and its stem position, replacing a Ronda caliber usually means fitting the same reference or a close dimensional match. The fitment tool shows the Ronda footprints and what shares them.

Swapping between a quartz and a mechanical movement is a different matter and is not a drop-in, since the two are built to entirely different internal layouts.

Reading a Ronda reference

A Ronda caliber is identified by a number and a series letter stamped on the movement, such as 515 or 5030.D. The number fixes the family and the letter the series, and together they pin down the diameter, the height, the battery type and the position of the winding stem.

Matching those figures is what makes a quartz replacement reliable. A movement that shares the reference, or another Ronda with the same footprint and battery, will sit correctly in the case where a merely similar-looking movement might not.

Find the drop-in donor

Open the MovementSwap fitment toolMatch a caliber to the movements that share its case.Find ronda quartz movement on eBayaffiliate

Ronda 515caliber and drop-in group Ronda 513Scaliber and drop-in group Ronda 6203.Bcaliber and drop-in group Ronda 6004.Bcaliber and drop-in group Ronda 5030.Dcaliber and drop-in group Ronda 5021.Dcaliber and drop-in group ETA movementsSwitzerland movement house Sellita movementsSwitzerland movement house Miyota movementsJapan movement house Seiko and TMI movementsJapan movement house All movement housesBrowse every maker

Sources: Ronda (Wikipedia) · Movement datasheets (as cited on each caliber page)