Franck Muller master square Ref 6000HSCDTD an 18ct gold and diamond-set wristwatch, circa 2000, dial: silvered guilloche with radial Roman numerals. Calibre: automatic winding movement. Case: 18ct gold, pave-set diamond bezel, diamonds together weighing approximately 1.50 carats, back secured by four screws. Case number: no. 78. Closure: Franck Muller brown leather band and an 18ct gold and diamond-set buckle. Dimensions: 35 mm square. Signed: case, dial and movement. Accessories: Franck Muller presentation box