International L111 front and rear turn signal bulbs both utilize 198 size bulbs for proper operation. The replacement chart covers 1950 through 1952 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International L111 uses the 198 bulb for both front and rear turn signals across the 1950-1952 model years.
The 198 is an ANSI-standardized bulb type, meaning its specifications conform to a defined North American standard recognized in both the United States and Canada.
The 198 bulb is a T5 miniature wedge type, a form factor characterized by a small wedge-shaped base that seats directly into a socket without a separate metal base or pins.
The 198 bulb operates at 12 volts and draws 2 watts, placing it among the lower-wattage bulbs used in automotive signaling applications.
The same bulb size, 198, is specified for both the front and rear turn signal positions on the International L111, indicating no distinction between the two positions in terms of bulb type.
The Light Duty designation associated with each entry reflects a vehicle classification rather than a bulb characteristic, and it applies consistently across all listed model years for both signal positions.