MK Personal Collection Rolex Jumbo Daytona Oyster Chronograph Wristwatch Ref 6239 Circa 1968.

MK Personal Collection The present lot is part of a larger privately held collection and is intended for exhibition purposes only. Rolex Jumbo Daytona Oyster Chronograph Wristwatch Ref 6239 Circa 1968. This very fine men's steel Rolex Cosmograph "Daytona" with a three-body construction case and screwed-down dedicated case (Serial # 1,599,XXX). The watch has an original bi-colored silver and black dial with applied steel bâton indexes, luminous dots outer minute/seconds divisions, subsidiary dials for the seconds, 12-hour and 30-minute registers, luminous steel "bâton" hands Cal. 72B Rolex Chronograph movement with a rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber and a self-compensating free-sprung Breguet balance spring. The watch is in overall good condition. The present watch is an early example of reference 6239, it was released soon after the first series reference 6239. During the beginning of the model's production, Rolex experimented with various dial configurations in order to realize its design blueprint for the Cosmograph Daytona. While earlier reference 6239s featured a small Daytona script below "Rolex Cosmograph", Rolex also introduced a different dial configuration displaying a slightly larger "Daytona" font below the “Cosmograph” inscription. These early dials represent Rolex's ingenuity and willingness to experiment with design composition. It was only much later that Rolex definitively printed the "Daytona" designation above the subsidiary register positioned at 6 o'clock.