The Chrysler St Regis uses H6024 and H6006 bulb sizes for both high beam and low beam headlight applications. The replacement chart covers 1955 to 1956 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chrysler St Regis uses two distinct sealed beam headlight units across its model years: the H6024 for 1956 and the H6006 for 1955.
Both the H6024 and H6006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When the filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H6024 is a 7-inch round sealed beam unit operating at 12V and conforming to ANSI standards recognized in both the United States and Canada.
The H6006 is a 5x7-inch rectangular sealed beam unit, also rated at 12V and built to the same ANSI standard applicable in the United States and Canada.
On the 1956 St Regis, the H6024 serves both the high beam and low beam functions, indicating a dual-filament design within a single round unit.
The 1955 St Regis similarly uses one unit type, the H6006, for both high beam and low beam positions.
The H6024 and H6006 are physically incompatible with each other due to their differing form factors, one being round and the other rectangular, making cross-year substitution between the 1955 and 1956 St Regis not possible.