Very rare, FLAT DIAL, Rolex Daytona reference 6263. 100% original dial and hands set. Nice original thick case with clear model and serial # (3,71X,XXX). Very clean Valjoux Rolex 727, running sharp and all chrono functions spot on. Original back case (6265 reference as common with Rolex Valjoux Daytonas). Equipped with a newer Rolex Oyster bracelet reference 78350-557.