Rolex Datejust 78273

Reference 78273 is the archetypal Yellow Rolesor model from the 31mm ‘Mid-Size’ Datejust 78xxx series, produced from approximately 1999 to 2006. It is powered by the Rolex Caliber 2235. The technical specification ‘Yellow Rolesor’ (3) denotes a bi-metal construction, combining a 904L steel case with a solid 18k yellow gold fluted bezel (27 code) and winding crown. The significance of the Ref. 78273 lies in its status as a cornerstone model, representing the definitive two-tone luxury watch in the modern 31mm size for its era.