Miyota 82S5 caliber: dimensions and drop-in group

Used in: the small-seconds open-heart 8200 member, in decorated entry automatics.

An 8200-family open-heart caliber at 26.00 mm x 5.67 mm with small seconds rather than the 82S0's central seconds. It shares the family footprint but needs its own small-seconds, open-heart dial.

Drop-in group: Miyota 82S open-heart, small seconds (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.