Rolex Ref 1601

**Rolex Date Reference 1601 - Steel and Yellow Gold Sigma Dial** The reference 1601 represents the Date model in Rolex's two-tone Rolesor construction, distinguished by its sigma dial configuration. This 36mm reference was produced from approximately 1959 to 1977, positioning it as a dress watch option within Rolex's date-displaying lineup during this period. The case combines stainless steel and yellow gold in Rolex's Rolesor construction, measuring 36mm in diameter. The watch features a fixed smooth bezel and acrylic crystal. Power comes from the automatic caliber 1570 movement, providing 42-48 hours of power reserve and 100-meter water resistance. The sigma dial is paired with a two-tone bracelet. This reference appeals to collectors seeking vintage Rolex Date models with two-tone construction and sigma dial specifications. The 1601 offers an entry point into Rolex's precious metal combinations from the 1960s-1970s production era, distinguished by its specific dial configuration within the Date model range.