Togo - Submarines, Kairyu, H-Class, R-class - Mint Stamp S/S 20H-149

This is a beautiful stamp souvenir sheet, issued by Togo in 2010, displaying submarines. Featured subs on the sheet shown include the 1938 Type A Ko-hyoteki class midget submarine, the 1918 British H class submarine used by the Royal Navy, Japan's Type C Ko-hyoteki submarine from 1942, Great Britain's 1918 R class submarine used during World War I, and the 1945 Kairyu midget submarine from the Imperial Japanese Navy. The sheet is Michel catalog #3748/ Bl. 559, and is Post Office fresh, mint never hinged, and F/VF.