Drop-in resolution
Donor movement for the Miyota 8215
Which movement drops into a Miyota 8215 case, and what has to match beyond the footprint.
Drop-in available. The Miyota 8205 shares the Miyota 8215 footprint (26.00 mm x 5.67 mm, centre seconds, date at 3) and is the standard donor.
The Miyota 8215 sits in the Miyota 8200 footprint (26.00 mm x 5.67 mm) group. The Miyota 8205, Miyota 821A share its casing diameter, height and calendar layout, so a case and dial built for the Miyota 8215 accept them with the correct dial and hands.
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.