 The Barchetta Sport Spider was designed by Mario Revelli de Beaumont and built by Nuccio Bertone and Rocco Motto.Around 50 production models were created and predominantly featured either a 750 cc Crosley or 1100 cc Fiat engine.During this time Siata also created the Cucciolo ("puppy") motor sold in kit form by Ducati and later used to power Ducati's first complete mopeds and motorcycles starting in 1952.