In the entire 13 year production of the automatic Zenith Cosmograph Daytona (1988 - 2001), the first porcelain gap dial, and this preceeding "4 liner" have seriously distanced themselves from the pack, and are considered the two rarest & most deseriable iterations. The 4 lines of text (only produced by Singer for 1 year), and the omission of 'Officially Certified' really give this white dial 16520 a less cluttered appearance, and only Rolex knows why they went back to the 5 line format! For purests (us included) this 4 line is the prettiest of the 16520 Cosmographs, and the all matt non fliplock '78360' Oyster bracelet is a link back to its 6265 heritage. Famously powered by the 4030 Zenith El Primero automatic chronograph calibre movement, which was greatly modified by Rolex, and accompanied by its Rolex arctic box, Daytona booklets, green wallet and historic Rolex service warranty. Waterproof to 100m.