Caliber reference
Ronda 505 caliber: dimensions and drop-in group
The published footprint of the Ronda 505 and which movements share it.
Used in: a three-hand Swiss quartz caliber in the 500 family, at the 11 1/2 ligne size.
A 500-family three-hand quartz caliber at 25.60 mm x 3.10 mm, sharing the 515's diameter and stem. It swaps within a matching three-hand dial with the 515, 513S and 6004.B.
Drop-in group: Ronda 11 1/2 quartz three-hand (25.60 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 505drop-in lookup
Ronda 515same footprint (25.60 mm x 3.00 mm)
Ronda 513Ssame footprint (25.60 mm x 3.00 mm)
Ronda 6004.Bsame footprint (25.60 mm x 3.30 mm)
Ronda 515 vs Ronda 505drop-in comparison
Ronda 513S vs Ronda 505drop-in comparison
Ronda 6004.B vs Ronda 505drop-in comparison
Ronda 6203.B vs Ronda 505drop-in comparison