"This is the genuine item and placed in the world champs as you correctly say on your website. The engine also has world champs markings. I acquired the model from John Newton in California who built it for Jim Nightingale. John was an american team member through until the mid 90s. The model is easily distinguishable from period photographs as having a larger inboard tail than outboard. The slot for the elevator linkage is also easily seen on the photos." Ian Mander