Patek Philippe
Ref. -
Manual-winding or ultra-thin quartz movement (cannot be confirmed without opening the case), approx. 40-44h power reserve if manual-winding. Approx. 32-34mm case, appears to be 18K yellow gold (hallmarks not visible), coin-edge (Clous de Paris) style fixed bezel, scratch-resistant mineral or sapphire crystal (cannot be confirmed from photos), integrated yellow gold Milanese mesh bracelet with matching clasp, white dial with black Roman numeral hour markers and black leaf-style hands. Functions: hours and minutes. Fluted yellow gold crown. Solid caseback engraved "Patek Philippe International Customer Service" with the Calatrava Cross emblem. Estimated production c. 1970s-1980s. Not rated for water resistance.
Specifications