TUDOR REF. 7159 MONTE CARLO Tudor, “Oysterdate,” case No. 779579, Ref. 7159/0, case made by Rolex, Geneva. Made circa 1972. Fine and rare, water-resistant, stainless steel wristwatch with date, round-button chronograph, register and tachometer. Three-body, polished and brushed, screwed-down engraved case back, crown and buttons, tachometer graduation on the steel bezel to 500 units per hour, Triplock winding crown protected by the crown guard, crystal with cyclops lens. Bicolor anthracite and black with luminous baton indexes, outer 1/5th seconds scale with 5 minute/second red Arabic markers, subsidiary dials for the seconds and the 45-minute register, aperture for the date at 6. Luminous steel baton hands, orange chronograph hand. Cal. 234, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating fl at balance spring. Dial, case and movement signed. Diam. 40 mm. Thickness 13 mm.