ROLEX REF. 6239 GRENE/TROPICAL DIAL, DOUBLE SWISS
Rolex "Cosmograph", case No.923070, Ref. 6239. Made circa 1962.
Very fine and rare, water-resistant, stainless steel wristwatch with round button chronograph,
registers, tachometer, steel bezel graduated to 300 UPH and a stainless steel
Rolex Oyster bracelet with deployant clasp.
Three-body, polished and brushed, curved lugs, tachometer on the bezel graduated
to 300 units per hour, screwed down case back.
Bicolor silver and brown with applied faceted steel baton indexes and luminous
dots, outer minutes/seconds divisions, subsidiary brown guilloche dials for the
seconds, the 12-hour and 30-minute registers. Luminous steel baton hands.
Cal. 722, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic
balance adjusted to 3 positions, shock absorber, self-compensating free-sprung
Breguet balance spring, Microstella regulating screws.