This imortant manual wind 6263 Cosmograph Daytona is particularly rare as it retains all of its key features from manufacture in 1974. These include the soleil "sigma" dial, correct (and increasingly rare) MK I acrylic bezel, domed plexiglas, and importantly, the 24-P301 chronograph pushers. The latter were often routinely replaced by Rolex during servicing (for the wider ridge P302 pushers) and most early 70's Daytonas you see today will have had them replaced at some point. So ours is a truly exceptional find, rare and beautifully preserved, and one of the best watch investments money can buy.