Daytona 6240 "Proto" - The first "prototype" iteration of the screw-down pushers Daytona, in fully original configuration. Hyper-Rare. Produced less than a year. Mark 0 pushers, oyster rivetted bracelet, black dial with silver sub-registers, bakelite bezel, mechanical caliber. Mint Condition. Initially produced as a prototype, the 6240 stands out from 6239/41 by featuring screw-down pushers for the first time. This is thus the first really waterproof Daytona, produced only in steel, with a “Bakelite Bezel” (apart apparently for some very early exemplars which featured a steel bezel). This is the first Daytona to bear the inscription “Oyster”. Very limited production due (i) to the fact that it was still a prototype and (ii) to the mild success it generated.