I think you are looking at the same book - and the word you seek is Marmini. However I think the puzzle car is the one pictured 'A sinistra'- on the left, and is bodied by fratelli Morelli. The picture 'A fianco' - at the side, is the Marmini bodied one.
If you are not looking at La Sport or you are an Italian expert you may think I am off my head!