When doing replacement or upgrading on 1967 - 1973 Fiat 850, 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 Headlight 1967 - 1973 6014
Back Up Light 1973 1156
Brake 1973 1157
Front Side Marker 1973 194
Front Turn Signal 1973 1157
License Plate 1967 - 1972 89
1973 97
Parking Light 1973 1157
Rear Side Marker 1973 194
Rear Turn Signal 1967 - 1973 1156
Tail Light 1973 1157