Nibbio Lu
Nibbio Lu correct name, by Mario Fumagalli. The suffix Lu is short for Lugano (Switzerland), it's probably added to differentiate this model from other Nibbio plans (Nibbio is a bird, common name for Italian model gliders). Emilio Biraghi commercialized this plan, he was a modeller and small entrepreneur of modelling industry in relationship with the near Swiss towns.