Fit is about how a watch sits. Diameter, lug-to-lug, and the way the end links leave the case tell you more than a slogan on a listing. This index points at those notes. It is not a size chart for an order form.

Case size

When a diameter already has a page, the note belongs on that page: 36 mm, 40 mm, and 41 mm are the sizes this library keeps as their own addresses. A diameter that does not have its own page is discussed on the shared case-size note, not as a new address invented for one record. Lug-to-lug, the distance from one lug tip to the other, has its own note because a small case can still wear long if the lugs stretch.

What to compare

Put the watch on the wrist and look at three things. Does the case stay over the flat of the wrist, or do the lugs hang past it? Do the end links meet the case without a gap you could rock with a fingernail? Does the clasp sit in the middle of the underside, or has the bracelet stretched so the clasp rides to one side? Those are fit questions. They are not a promise about who made the part.

Families of models are indexed on Families. Changes to a bezel insert, a bracelet, or a hand set are on Modifications. Words such as tachymeter are on Glossary. A library page is written by {Site}. These notes are not authentication and not a shop.