Ladies Rolex Cellini in 18k with yellow gold applied Arabic hour markers on leather strap. Quartz. 26 mm case size. Ref 6621. Circa 1993 Fine Pre-owned Rolex Watch. Certified preowned Rolex Cellini 6621 watch is made out of yellow gold on a Tan Leather Strap band with a 18k Deploy buckle. This Rolex watch has a 26 x 33 mm case with a Round caseback and Gold Arabic Numeral dial. Circa: 1990s .