The International B120 uses a 198 bulb size for both front and rear turn signal applications. The replacement chart covers 1959 to 1960 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 International B120 uses the 198 bulb for both front and rear turn signals across the 1959-1960 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 follows a T5 miniature wedge form factor, which refers to a small wedge-base design 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 signal bulbs in automotive applications.
The Light Duty designation associated with the 198 bulb entries reflects the vehicle trim or weight classification rather than a characteristic of the bulb itself.
Because the same bulb size applies to both the front and rear turn signal positions on the International B120, the 198 serves as a single fitment across all four turn signal locations on the vehicle.