ROLEX REF. 6240 SO-CALLED SOLO ROLEX STAINLESS STEEL
Rolex, case No. 1269462, Ref. 6240/6239. Made circa 1965.
Very fine and extremely rare, early, water-resistant, stainless steel wristwatch with round button chronograph, registers, tachometer, anti-reflective black bezel
graduated to 200 units per hour
Three-body, polished and brushed, screwed-down case back, buttons and
crown, tachometer graduation on the bezel to 200 units per hour.
Bi-color black and silver with applied black steel indexes and luminous dots,
subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer
minute/ seconds division. Luminous steel baton hands.
Cal. 72B, rhodium plated, 17 jewels, straight line lever escapement, monometallic
balance, shock absorber, self-compensating free-sprung fl at balance
spring, Microstella regulating screws.