Hodinkee: In-Depth Breaking Down All Five Sizes Of Rolex Oyster Perpetual
“They’re the words printed on nearly every Rolex dial: “Oyster Perpetual.” Two seemingly innocuous combinations of letters that are not only historically significant, but that also neatly summarize everything that makes Rolex the horological powerhouse it is. The first waterproof watch case Rolex made was the “Oyster.” Perpetual refers to the perpetually winding rotor inside every Rolex watch. It’s why you never find the word “Automatic” on the dial – it would just be redundant.”
