This aircraft is often described as a WA.81 on other web sites but the above information was taken from the data plate still riveted to the aircraft. From Wikipedia: The Wassmer WA-80 Piranha was a two-seat low-wing cabin monoplane trainer designed and built by Société Wassmer. It was was a scaled down version of the company's WA-50 four-seater, and the prototype, registered F-WVKR, first flew in November 1975 powered by a 100 hp Rolls-Royce Continental O-200 engine.