Rolex. An attractive and unusual 18K gold automatic calendar wristwatch with sweep centre seconds

Rolex. An attractive and unusual 18K gold automatic calendar wristwatch with sweep centre seconds
Signed Rolex, Day-Date, ref. 18038, case no. 5'989'522, circa 1981
Cal. 3055 automatic movement, 27 jewels, black dial with Rolex pattern, diamond-set hour markers, 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.