Sellita SW210-1 caliber: dimensions and drop-in group

Used in: the Sellita hand-wound, the drop-in alternative to the ETA 2801-2.

Sellita's hand-wound 11 1/2 ligne caliber at 25.60 mm x 3.35 mm, dimensionally matched to the ETA 2801-2. It is the direct manual-wind donor when a 2801-2 is unavailable.

Drop-in group: 11 1/2 ligne hand-wound, no date (25.60 mm x 3.35 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.