Rolex: A rare 1930s 9ct. two colour gold jump-hour rectangular wristwatch in flared case with pink gold wings, the brushed silvered dial with Arabic five minute marks, large subsidiary seconds at six and aperture at twelve for the hour, the snap on back with makers mark numbered 1609 1491, the signed Extra Prima observatory quality movement timed to six positions, jewelled to the centre with fifteen jewels and numbered 75574