Drop-in resolution
Ronda 715 vs Ronda 705: do they swap?
Whether the Ronda 715 and Ronda 705 share a case, and what changes if you move between them.
Same footprint, different calendar. The Ronda 715 and Ronda 705 share the 26.20 mm x 2.50 mm case fit, but the Ronda 715 is centre seconds, date at 3 or 6 and the Ronda 705 is centre seconds, no date, slim, so a swap needs a dial cut for the new layout.
The Ronda 715 is a very thin Swiss three-hand quartz movement, in slim quartz dress watches. The Ronda 705 is a slim no-date member of the Ronda 700 quartz family.
They differ in calendar layout (centre seconds, date at 3 or 6 vs centre seconds, no date, slim). A slim three-hand quartz caliber at 26.20 mm x 2.50 mm with a selectable date at 3 or 6. Thinner than the 500-series, it is its own 700-series footprint and pairs with the same-family 763.
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.