When doing replacement or upgrading on 1971 – 1979 Fiat 128, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

High Beam and Low Beam Headlight1971 – 1979 6014
Back Up Light1973 – 1979 1156
Brake1971 – 1979 1157
Front Side Marker1971 – 1979 194
Front Turn Signal1973 1156
1971 – 1972, 1974 – 1979 1157
License Plate1979 67
1971 – 1972, 1974 – 1978 89
1973 97
Parking Light1971 – 1972, 1974 – 1979 1157
1973 97
Rear Side Marker1971 – 1979 194
Rear Turn Signal1971 – 1979 1156
Tail Light1971 – 1979 1157