Drop-in resolution
Donor movement for the Miyota 9039
Which movement drops into a Miyota 9039 case, and what has to match beyond the footprint.
Drop-in available. The Miyota 9015 shares the Miyota 9039 footprint (26.00 mm x 3.90 mm, centre seconds, no date) and is the standard donor.
The Miyota 9039 sits in the Miyota 90 slim footprint (26.00 mm x 3.90 mm) group. The Miyota 9015, Miyota 90S5 share its casing diameter, height and calendar layout, so a case and dial built for the Miyota 9039 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.