One new EPC brand ignition distributor rotor (made in Germany), part number EP243, DRB864, 9624, 711195-01, 1.234.332.814, 9922446.  This fits:

Fiat 850 Spider 843cc & 903cc with Marelli ignition 1971 - 1973
Fiat 850 Racer 843cc & 903cc with Marelli ignition 1971 - 1973
Fiat 850 Coupe 843cc & 903cc with Marelli ignition 1971 - 1973
Fiat 124 Coupe & Spider 1600cc with Marelli ignition 1971 - 1972 (distributor # S144BX, single point type)
Fiat 128 1300cc with Marelli ignition 1971 - 1973