Drop-in resolution
Miyota 9015 vs ETA 2893-2: do they swap?
Whether the Miyota 9015 and ETA 2893-2 share a case, and what changes if you move between them.
Close in diameter, not a drop-in. The Miyota 9015 (26.00 mm x 3.90 mm) and ETA 2893-2 (25.60 mm x 4.10 mm) are near in size but differ in height, dial feet or layout, so moving between them means a new dial, hands and often a case adjustment.
The Miyota 9015 is the slim premium Japanese automatic, a lower-cost slim alternative to the 2892 platform. The ETA 2893-2 is the GMT member of the 2892 family, base for many caller-GMT travel watches.
They differ in diameter (26.00 mm vs 25.60 mm), height (3.90 mm vs 4.10 mm), calendar layout (centre seconds, date at 3 vs centre seconds, GMT 24h hand, date at 3). A slim 3.90 mm movement at 26.00 mm diameter that hacks and hand-winds. It shares its dial-foot pattern with the 9039, so the two interchange within a dial built for the 90 series.
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.