Rolex Datejust 1601 has all the hallmarks of a classic vintage Rolex, including the famous Pie Pan dial with sloped edges, Tritium that has since aged to a warm honey color, and an older-style acrylic crystal. Of course, there’s the case with narrower lugs. This model is incredibly sought-after among collectors in the know because it also features what is commonly called a “Sigma” dial, indicating that the hour markers and hands are made from white gold, a feature that would otherwise be indistinguishable from stainless steel were it not for the Greek Sigma letters flanking either side of the T SWISS T text at the very bottom of the dial. A unique and fascinating collector’s item.