Rolex Tudor, rare stainless steel Oysterdate Monte Carlo chronograph wristwatch, Ref. 7159/0, c. 1974, Cal. Valjoux 234 mechanical movement, 17 jewels, grey matte dial with luminous baton indexes, luminous hands with black borders, orange chronograph hand, outer orange five minute divisions on black chapter ring, two subsidiary dials for constant, seconds and 45 minutes register, magnified aperture for date at 6, polished bezel with tachymetre scale calibrated for 500 units, case, dial and movement signed, with box and papers, diameter 40 mm