The International C132 uses a 198 bulb size for both front and rear turn signal applications. The replacement chart covers 1961 to 1962 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 C132 uses the 198 bulb for both front and rear turn signals across the 1961-1962 model years.
The 198 is an ANSI-standardized bulb, meaning it conforms to a defined set of electrical and physical characteristics recognized across the United States and Canada.
The 198 bulb follows the T5 miniature wedge form factor, a designation that refers to a tubular glass envelope approximately 5/8 of an inch wide with a wedge-style base that seats directly into a socket without a separate metal cap.
Operating at 12 volts and 2 watts, the 198 is a low-power bulb, consistent with its role as a signaling rather than illumination source.
The Light Duty classification noted in the specifications indicates the 198 bulb is designated for lighter vehicle applications rather than heavy-duty or commercial-grade configurations.
Because the same bulb size applies to both the front and rear turn signal positions on the International C132, a single bulb type serves all four turn signal positions on the vehicle.
The wedge base design of the 198 bulb means fitment is socket-dependent, and substitution with a different base type, such as a bayonet or screw base, would not be physically compatible even if voltage and wattage ratings were otherwise similar.