The International S120 uses a 198 bulb size for both front and rear turn signal applications. This replacement chart covers vehicle production spanning 1956 to 1957.
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 S120, covering both the 1956-1957 model years.
The 198 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used in both the United States and Canada.
It is classified as a miniature wedge bulb in the T5 form factor, which refers to a tubular glass envelope approximately 5/8 of an inch wide with a wedge-style base that requires no separate socket pins.
The 198 bulb operates at 12 volts and draws 2 watts, placing it at the lower end of the power range for automotive signal lighting.
The Light Duty designation applies to all listed entries for the International S120, indicating these specifications are associated with the light-duty variant of the vehicle.
The 198 bulb is used in both the front and rear turn signal positions across the covered model years, meaning the same bulb type serves all four signal locations on the vehicle.