Caliber reference
Ronda 5021.D caliber: dimensions and drop-in group
The published footprint of the Ronda 5021.D and which movements share it.
Used in: a Swiss bicompax quartz chronograph, in two-register chronograph watches.
A two-register quartz chronograph at 28.60 mm x 4.40 mm. It shares the 5000-series family with the 5030.D but has a different sub-dial count, so a 5030.D dial will not fit it.
Drop-in group: Ronda quartz bicompax chronograph (28.60 mm x 4.40 mm). Matching diameter and height is necessary but not sufficient. A donor is only a true drop-in when the dial-foot positions, hand-hole sizes, stem length and calendar layout also match. Two movements can share a case and still need a new dial, re-broached hands or a cut-to-length stem.
Drop-in and related calibers
Donor movement for Ronda 5021.Ddrop-in lookup
Ronda 5030.D vs Ronda 5021.Ddrop-in comparison