Miyota 9012 caliber: dimensions and drop-in group

Used in: a 90-series premium automatic with a 24-hour sub-hand and date.

A 90-series slim automatic at 26.00 mm x 3.90 mm with date at 3 and a 24-hour sub-hand. It shares the 90-series footprint and dial feet with the 9015 but needs a dial with the 24h register.

Drop-in group: Miyota 90 slim, date + 24h (26.00 mm x 3.90 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.