Rolex Oyster Perpetual Date | Ref. 1501The Rolex Date Ref. 1501 was introduced in the mid 1950s as a slightly smaller alternative to the flagship Datejust. By the 1970s, the Ref. 1501 was offered with a variety of dial and bezel options, including the distinctive engine turned fluted bezel seen on many examples. The Caliber 1570 automatic movement inside is regarded as one of Rolexs most robust and widely used chronometer rated calibers from this era, featuring a quickset date and 26