The International R120 uses a 194 bulb size for the front side marker and a 97 bulb size for the rear side marker. The replacement chart covers 1953 to 1955 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 R120 uses two distinct bulb types across its side marker positions for the 1953-1955 model years: the 194 at the front and the 97 at the rear.
Both the 194 and 97 are ANSI-standardized bulbs recognized in the United States and Canada, meaning they conform to a defined set of electrical and physical specifications rather than being proprietary fitments.
The 194 is a T10 miniature wedge bulb, a form factor that relies on the wedge shape of its base to make electrical contact rather than a separate metal base component.
The 194 operates at 12 volts and draws 3.78 watts, placing it in the low-wattage range typical of marker and courtesy lighting applications.
The 97 uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and rotated to lock into place, a common base type in automotive lighting of that era.
The 97 is described as a variant of the 1156 bulb, though the two are not interchangeable without verification, as variants within a family can differ in wattage, base pin positioning, or envelope size.
The 97 operates at 12 volts and draws 13 watts, a significantly higher wattage than the 194, reflecting its role in a more visible rear marker position.
The front and rear side marker positions on the International R120 (1953-1955) are designated as Light Duty fitments, indicating the bulb sizes listed apply specifically to that vehicle configuration.