Rolex "Oyster Chronographe", Case No. 688643, Ref. 6234, 36 mm, circa 1950

An attractive Rolex chronograph
Case: steel, screw back ref. 6234, screwed "Twinlock" winding crown, later riveted steel "Oyster" bracelet, no. 57. Dial: silvered, applied indexes, auxiliary seconds, 30 min. and 12h counter, tachy scale, blue telemeter scale, blued leaf hands. Movm.: bridge movement, rhodium-plated, ground, 17 jewels, finely ground chronograph steel parts, ratchet wheel, Glucydur screw balance.