The International 908C front and rear turn signal bulbs both utilize a 198 size bulb for proper operation. The replacement chart covers 1968 to 1969 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 198 bulb is the sole turn signal bulb size listed for the International 908C across both the front and rear positions for 1968-1969.
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 with a T5 designation, where "T5" refers to a tubular bulb body that is 5/8 of an inch wide.
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, consistent with the standard electrical system voltage found in most automotive applications of that era.
At 2 watts, the 198 is a low-output bulb, which is typical for indicator and signal functions rather than primary illumination.
The Light Duty classification applies to all listed entries for the International 908C, indicating these specifications correspond to the lighter-weight variant of the vehicle.
The front and rear turn signal positions share the same bulb size for both model years covered, meaning a single bulb type serves all four turn signal positions on the vehicle.