The boat badge of HMS 'Calypso' 1917. The official pattern approved in 1921. On a field red, a female head white, with ornaments gold, the design was taken from a Greek red figure vase painting in the British Museum. Calypso was a sea nymph who took the hero Odysseus as a lover and held him, a virtual prisoner, on her island for seven years. The badge is a pentagonal shape with a gold rope twist border, representing a cruiser. It is made of cast brass, painted and drilled at the corners. 'CALYPSO' is inscribed on the reverse. 'Calypso' was a C-class cruiser launched in 1917. She took part in the Second Battle of Heligoland Bight on 17th November 1917. During the interwar period, she evacuated Prince Andrew of Greece and his family from Greece following a military coup (including the infant Prince Philip). 'Calypso' spend the early part of the Second World War blockading the North Sea. After being sent to the Eastern Mediterrranean she was sunk by the Italian submarine 'Bagnolini' 12 June 1940, south of Crete.