Rolex Submariner Ref. 5513 double swiss Underline PCG. Made in 1963, the early case is fitted with pointed crown guards – a beautiful design produced for approximately three years only. Most impressive is the dial with its gilt printing, beautifully complemented by original gilt hands with luminous inserts that perfectly match the luminous hour markers. The underline found at 12 o’clock, along with the double ‘Swiss’ print at 6 o’clock are small but very significant details that set this watch apart. Signifying the use of tritium for the luminous material, the presence of the underline is perfectly in line with the watch’s production date of 1963, used when Rolex transitioned from using radium to tritium for the luminous material. The presence of two ‘Swiss’ markings, one printed in gilt, the other with white ink, is highly unusual, and the first time seen on a Rolex Submariner ref. 5513 dial. A superb, riveted Oyster bracelet ref.7206, completes the watch, making it a worthy addition to a world-class collection of sports watches. Overall in well preserved and original condition.