Miyota 82S7 caliber: dimensions and drop-in group

Used in: the fullest 82S member, adding a 24-hour or day/night indicator at 9.

An 8200-family open-heart caliber at 26.00 mm x 5.67 mm with small seconds and a 24-hour indicator at 9. It shares the family footprint with the 82S5 but adds the 24h register, so it needs its own dial.

Drop-in group: Miyota 82S open-heart, small seconds + 24h (26.00 mm x 5.67 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.