Vintage Omega Manual Winding Cal. 266 – Ref. 2639-13 – Staybrite Steel Case ​An exceptional, classic vintage Omega gents' watch featuring the highly regarded manual-winding Caliber 266 movement. This particular timepiece boasts a fascinating history, featuring a commemorative Swedish engraving on the case back, adding a unique layer of provenance for collectors. ​Specifications & Details ​Brand: Omega ​Reference Number: 2639-13 ​Movement: Manual winding, Omega Caliber 266 (17 Jewels) ​Movement Serial Number: 13610153 (Dates production to approximately 1952) ​Case Material: Acier Staybrite (Premium vintage stainless steel alloy) ​Case Back: Screw-down case back with internal Omega signatures, reference stamps, and an external historical presentation engraving. ​Dial: Beautiful original/vintage off-white/cream dial with applied golden dagger/arrowhead hour markers, an Arabic '12', and a recessed sub-seconds register at 6 o'clock. ​Hands: Matching golden Dauphine hands. ​Crown: Original vintage Omega signed crown with logo. ​Strap: Fitted on an aftermarket brown alligator-style leather strap with a steel buckle signs of wear ​Condition Report ​Dial & Hands: The dial shows a light, even vintage patina consistent with its age, giving it immense character. The applied indices and Dauphine hands retain a brilliant golden shine. ​Case: The Staybrite stainless steel case is in honest vintage condition with sharp lines and light surface scratches from careful wear over the decades. No severe dings or damage. ​Movement: The copper-toned Caliber 266 movement is visually very clean, showing crisp engraving stamps ("17 JEWELS", "SWISS", "266", and the Omega logo). The regulator is well-centered. It is currently in running condition, though a standard service is always recommended for daily vintage timekeeping accuracy. ​Case Back Engraving: The exterior features a beautifully crisp, historical engraving from the Swedish Carnegie Hero Fund ("CARNEGIESTIFTELSEN") dedicated to "HOLGER JANSSON", marked with the dates "1919 19/10 54". A perfect addition for any serious Omega collector or vintage watch enthusiast looking for a piece with distinct historical charm and a legendary robust movement. ​The watch will be safely packaged and shipped with tracking.