This photo is of Bill Tenney and son, David. It was probably taken in the late 1950's. David is standing on a brand new Anzani. From 1957 to 1963 the Unitwin was imported to the US by legendary racer Bill Tenney of the Aeromarine Co. of Crystal Bay, Minnesota and they soon started winning races. Tenney added his considerable expertise to their development by communicating regularly with the factory making suggestions for improvements many of which Harrison incorporated. In the 1950's you could buy a full race Anzani Unitwin for $595 or $495 for the standard engine.