Ronda 763 caliber: dimensions and drop-in group

Used in: a small oval-form Swiss quartz movement, in ladies and small dress watches.

A small form caliber at 15.30 x 18.10 mm and 2.50 mm tall, shaped for compact and ladies cases. Its footprint has nothing in common with the 11 1/2 ligne core, so it only pairs with same-size small Ronda quartz calibers.

Drop-in group: Ronda small-form quartz (15.30 x 18.10 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.