Longines Calatrava-style dress watch, reference 6666-13, fitted with the renowned manually-wound caliber 12.68Z. Stainless steel case of approximately 34.5 mm in diameter (excluding crown), produced ca. 1958–1959 based on the movement serial 10742691.

- Dial: original silver-toned dial with applied baton indices and printed "Longines / Fab. Suisse" signature; small seconds register at 6 o'clock; light patina consistent with age - Hands: original dauphine-style hour and minute hands with light oxidation on the minute hand - Case: stainless steel, approximately 34.5 mm diameter excluding the crown; sharp lugs and bevels suggest minimal previous polishing - Crystal: plexiglass, clean - Crown: Longines-style winding crown - Movement: manually-wound caliber 12.68Z, 17 jewels, serial 10742691, running and keeping time during 24-hour test - Strap: new black leather strap, not original The watch runs and keeps time. Service status unknown — no recent documented service. Supplied with a modern Longines pouch (not the original period box). Water resistance untested for current vintage seal. From a private collection. Shipped registered and insured to EU destinations.

From a private collection. Shipped registered and insured to EU destinations.