Rolex. An 18K gold automatic wristwatch with sweep centre seconds, alternate red and black date, "Thunderbird" bezel and champagne dial

Rolex. An 18K gold automatic wristwatch with sweep centre seconds, alternate red and black date, "Thunderbird" bezel and champagne dial
Signed Rolex, Oyster Perpetual, Datejust, ref. 6309, case no. 85'624, circa 1958
Cal. 10 1/2 '''automatic movement, 18 jewels, champagne brushed dial, applied baton numerals with luminous accents, luminous hands, sweep centre seconds, window for alternate red and black date, tonneau-shaped water-resistant-type case, textured "Thunderbird" revolving bezel calibrated for 60 units with raised Arabic numerals and baton markers, screw down crown, screw back engraved, case, dial and movement signed
36 mm. diam.