Important Collectors’ Wristwatches, P...

Geneva, Nov 16, 2008

LOT 602

Stainless Steel, Ref. 6240 Rolex, ?Oyster Cosmograph?, case No. 1298309, Ref. 6240/6239. Made circa 1966. Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph, registers, tachometer, anti-reflective black bezel graduated to 200 units per hour and a stainless steel Rolex Oyster riveted bracelet with deployant clasp.

CHF 28,000 - 35,000

USD 26,000 - 32,000 / EUR 18,000 - 22,000

Sold: CHF 36,000

C. Three-body, polished and brushed, screwed-down case back, buttons and crown, tachometer graduation on the bezel to 200 units per hour. D. Bicolor black and silver with applied steel baton indexes and luminous dots, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer minute/seconds division. Luminous steel baton hands. M. Cal. 722, rhodium plated, 17 jewels, straight line lever escapement, monometallic balance, shock absorber, self-compensating free-sprung Breguet balance spring, Microstella regulating screws. Dial, case and movement signed. Diam. 37 mm. Thickness 14 mm. Approx overall length 165 mm.


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Grading System
Grade: AAA

Excellent
Case: 3

Good
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3-01

Good

HANDS Original

Notes

The reference 6240 has always been an interesting model as it marks the transition from the pump pushers to the screw-down version. This reference was the first model to integrate this water/dust protecting feature but it also had its dial marked ?Oyster? for the first time, as well as having "O T Swiss T O" at the bottom, which is not usually found on any other references.