The International 200 front and rear turn signal bulbs both require a 198 size bulb. The replacement chart contains bulb size specifications for vehicles produced between 1974 and 1975.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 200 uses bulb size 198 across all listed turn signal positions for 1974-1975, covering both the front and rear turn signal applications.
The 198 bulb follows the ANSI standard, meaning it conforms to a specification recognized across the United States and Canada.
It is classified as a miniature wedge bulb with a T5 designation. The T5 rating refers to the tubular bulb shape, with the number indicating a width of 5/8 of an inch.
The wedge base design means the bulb is held in place by the socket gripping the glass envelope directly, with no separate metal base or pins involved.
The 198 bulb operates at 12 volts, which is consistent with the standard electrical system voltage found in most conventional automotive applications of that era.
At 2 watts, the 198 is a low-output bulb, reflecting its use in signaling functions rather than primary illumination.
The front and rear turn signals on the International 200 share the same bulb size for both listed model years, meaning a single bulb type serves all four turn signal positions on the vehicle.