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 Headlight 1959 – 1963 H5006
High Beam Headlight 1959 – 1963 H5001
Back Up Light 1959 – 1963 1156
Brake 1960 – 1962 1034
1959, 1963 1157
Dome Light 1959 – 1960, 1962 – 1963 1004
1961 578
Front Turn Signal 1959 – 1963 1157
License Plate 1959 – 1963 67
Parking Light 1959 – 1963 1157
Rear Turn Signal 1959 1034
1960 – 1963 1157
Tail Light 1959 – 1963 1034
Courtesy 1961 – 1962 68
1963 90
Engine Compartment Light 1962 – 1963 89
Glove Box 1959 – 1963 57
Map Light 1959 – 1960, 1962 – 1963 90
Radio Display 1959 1891
1962 1893
1960 57
Trunk 1959 – 1963 89