The International L121 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1950 to 1952 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 H6024 is the sole bulb type listed across all headlight positions for the International L121, covering model years 1950-1952.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts, built to ANSI standards recognized in both the United States and Canada.
A sealed beam unit is a self-contained assembly in which the filament, reflector, and lens are fused into a single glass envelope, meaning the entire unit is replaced rather than an internal bulb.
The H6024 specification applies equally to both the high beam and low beam headlight positions on the International L121, indicating a single bulb type serves both functions.
Because the H6024 is a sealed beam design, standard replaceable bulb interchangeability practices do not apply; only a direct sealed beam replacement of the same type is appropriate.