01/31/2008. Remarks by Johan Visschedijk: "In 1924 the Admiralty issued the specifications 5/24 for a fleet trainer aircraft with an interchangeable wheel/float landing gear. Harold Bolas designed a side-by-side two-seater powered by a 220 hp Rolls-Royce Falcon twelve-cylinder liquid-cooled V-engine. The sole prototype flew for the first time on December 10, 1926. It was not taken into production."