Rolex. A rare 18K gold automatic bubble back wristwatch with date, sweep centre seconds and black lacquered dial

Rolex. A rare 18K gold automatic bubble back wristwatch with date, sweep centre seconds and black lacquered dial
Signed Rolex, Oyster Perpetual, Datejust, ref. 6105, case no. 907'137. circa 1963
Automatic movement, 2 jewels, black lacquered dial, applied dagger numerals, luminous accents, luminous hands, sweep centre seconds, window for date, tonneau-shaped water-resistant bubble back type case, milled bezel, screw back, screw down crown, case, dial and movement signed
36 mm. diam.