This is a 55A Bosch Alternator Used on Fiat. The Mounting Ears are Directly Opposite the Adjusting Ear. The Same Unit, But in a 65A Version, is the 13152. The Same 55A Unit in Marelli is the 14293. In Order to Interchange the Marelli and Bosch, the Units Must Be Fit With the Fan and Pulley, as the Rotor Shaft Diameters are Different.