Jumpahead

British Beachcat built in the 1960's, may be only one of these in the United States.

Excerpt from the bio of the designer Bill O'Brien:

...Bill spurred on by the favourable reaction at Weston Sailing Club for multi-hulls tidied up his 1946 design, calling it Jumpahead. Bill then with others formed the Springbok Restricted Class Association for catamarans in November 1955 and wrote to Roland Prout and many others asking them to join in with similar sizes to meet the restrictions. Bill made a scale model of Jumpahead and exhibited it on the Captain Watts stand at the 1956 London Boat Show. The Prout brothers also exhibited one hull of their Shearwater on their folding dinghy stand. Both aroused interest, backed largely by the resultant publicity of the Ken Pearce Endeavour success at Cowes. Thus, the Jumpahead and Shearwater catamarans emerged on the sailing scene.

Full bio at http://www.friendsandrelations.com/partners/rnli/html/detail.php?id=3685