The International L110 uses a 198 bulb size for both front and rear turn signal 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 198 bulb is the sole bulb type listed across all turn signal positions for the International L110, covering model years 1950-1952.
The 198 is an ANSI-standardized bulb used in the United States and Canada, classified as a miniature wedge type with a T5 form factor.
The T5 designation refers to the tubular glass envelope, with the numerical value indicating its width in eighths of an inch, making it a notably small bulb profile.
The 198 bulb operates at 12 volts and draws 2 watts, placing it at the low end of the power consumption range for automotive signal lighting.
The International L110 (1950-1952) uses the same 198 bulb specification for both the front and rear turn signal positions across all listed years and the Light Duty trim designation.
The wedge base design of the 198 bulb means it is retained by friction within its socket rather than by a bayonet-style locking mechanism, which is a relevant fitment consideration during replacement.
Because the front and rear turn signal sockets share the same bulb specification, a single bulb type services all four turn signal positions on the vehicle.