MK Personal Collection The present lot is part of a larger privately held collection and is intended for exhibition purposes only. Rolex Ref 6238 Pre Daytona Oyster Chronograph Wristwatch Circa 1963. This very fine men's steel Rolex Cosmograph Pre "Daytona" with a three-body construction case and screwed-down case back, (Serial #1,00,385) with the original silver painted dial with applied steel bâton indexes and luminous dots, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer tachometer scale, luminous steel bâton hands, Cal. 727 Rolex Chronograph movement with a rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating free-sprung Breguet balance spring, The watch is in overall good condition. It just needs a good polish. Produced from approximately 1960 to 1967, the Rolex reference 6238 is a perfect embodiment of the timeless chronograph. Referred to as the “Pre-Daytona” by collectors, the reference 6238 shares similar case size, pushers and baton hands as its contemporary, the first Cosmograph Daytona reference 6239. While the Cosmograph Daytona always features a two tone dial with either black with silver sub dials or vice versa, the reference 6238 was offered only with a monochromatic dial. Marking the end of an era, the 6238 was also the last Rolex chronograph to feature a smooth bezel and a graduated tachymeter scale printed on the dial. Rolex’s later Daytona models would all display the scale on the bezel. The present example Rolex “Pre-Daytona” ref. 6238 features a well-preserved silver dial with the cal. 72B making it one of the last examples before it was transitioned to the cal. 727 featured also in the ref. 6239. With a “T SWISS T” designation at 6 O’clock, the present second-generation dial indicates the use of tritium for the luminous material applied on the hands and indexes.

MK Personal Collection The present lot is part of a larger privately held collection and is intended for exhibition purposes only. Rolex Ref 6238 Pre Daytona Oyster Chronograph Wristwatch Circa 1963. This very fine men's steel Rolex Cosmograph Pre "Daytona" with a three-body construction case and screwed-down case back, (Serial #1,00,385) with the original silver painted dial with applied steel bâton indexes and luminous dots, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer tachometer scale, luminous steel bâton hands, Cal. 727 Rolex Chronograph movement with a rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating free-sprung Breguet balance spring, The watch is in overall good condition. It just needs a good polish. Produced from approximately 1960 to 1967, the Rolex reference 6238 is a perfect embodiment of the timeless chronograph. Referred to as the “Pre-Daytona” by collectors, the reference 6238 shares similar case size, pushers and baton hands as its contemporary, the first Cosmograph Daytona reference 6239. While the Cosmograph Daytona always features a two tone dial with either black with silver sub dials or vice versa, the reference 6238 was offered only with a monochromatic dial. Marking the end of an era, the 6238 was also the last Rolex chronograph to feature a smooth bezel and a graduated tachymeter scale printed on the dial. Rolex’s later Daytona models would all display the scale on the bezel. The present example Rolex “Pre-Daytona” ref. 6238 features a well-preserved silver dial with the cal. 72B making it one of the last examples before it was transitioned to the cal. 727 featured also in the ref. 6239. With a “T SWISS T” designation at 6 O’clock, the present second-generation dial indicates the use of tritium for the luminous material applied on the hands and indexes.