When doing replacement or upgrading on 1959 – 1963 Buick Invicta, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight1959 – 1963 H5006
High Beam Headlight1959 – 1963 H5001
Back Up Light1959 – 1963 1156
Brake1960 – 1962 1034
1959, 1963 1157
Dome Light1959 – 1960, 1962 – 1963 1004
1961 578
Front Turn Signal1959 – 1963 1157
License Plate1959 – 1963 67
Parking Light1959 – 1963 1157
Rear Turn Signal1959 1034
1960 – 1963 1157
Tail Light1959 – 1963 1034
Courtesy1961 – 1962 68
1963 90
Engine Compartment Light1962 – 1963 89
Glove Box1959 – 1963 57
Map Light1959 – 1960, 1962 – 1963 90
Radio Display1959 1891
1962 1893
1960 57
Trunk1959 – 1963 89