Rolex. An attractive 18K white gold automatic calendar wristwatch with sweep centre seconds and blue lacquered dial

Rolex. An attractive 18K white gold automatic calendar wristwatch with sweep centre seconds and blue lacquered dial
Signed Rolex, Oyster Perpetual, Day-Date, ref. 1803, case no. 5'345'452, circa 1972
Cal. 1556 automatic movement, 26 jewels, blue lacquered dial, applied baton numerals with luminous accents, sweep centre seconds, aperture for day, magnified window for date, tonneau-shaped water-resistant-type case, fluted bezel, screw back, case, dial and movement signed
36 mm. diam.