Stamps: Submarines, Centenary of the Royal Navy Submarine Service. Comprising 1 set of 4 stamps in Presentation Pack No. 322, issued by Royal Mail on 10 April 2001. 11.5x21.5cm. Vanguard Class 1992 / 15900 tons, 2nd; Swiftsure Class 1973 / 4900 tons, 1st; Unity Class 1939 / 540 tons, 45p; Holland Class 1901 / 122 tons, 65p. Designed by Dick Davis with photographs courtesy Royal Navy Submarine Museum. Pack text describes life aboard HMS Splendid, with sketches; diagram and technical details of submarines on verso. With one postcard of each stamp