Rolex Datejust Silver "Singer " dial ref 1601By the close of the 1960s, the renowned dial maker, Singer, was approached by several Swiss watchmakers to create fresh dial designs for their model collections. In their well known 1967 1968 catalog, Singer unveiled a variety of design concepts, printing techniques, markers, and finishes for multiple brands. Among the pages of this catalog, some of the most iconic Rolex dials first made their appearance, including the Yach master Daytona and the