The Austin Princess high beam and low beam headlight bulbs both utilize the H6024 size. The replacement chart covers vehicle production spanning 1964 to 1966.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the sole bulb type listed across all positions and years in the Austin Princess headlight specifications, appearing in both high beam and low beam applications for 1964-1966.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in the United States and Canada.
As a sealed beam unit, the H6024 does not contain a replaceable bulb element. When the unit fails, the entire assembly is replaced rather than an internal filament or capsule.
The Austin Princess (1964-1966) uses the same H6024 unit for both high beam and low beam functions, meaning the sealed beam serves a dual-purpose role within the headlight assembly.
The ANSI standardization of the H6024 means the unit conforms to fixed physical and electrical specifications, which historically allowed interchangeability across different vehicle makes that shared the same sealed beam standard.