International A120 vehicles utilized 194 bulb size for front side marker applications and 97 bulb size for rear side marker installations. The replacement chart covers 1957 to 1958 model 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 A120 uses two distinct bulb types across its front and rear side marker positions for the 1957-1958 model years, with each position requiring a specific and non-interchangeable bulb.
The 194 bulb is an ANSI-standardized miniature wedge type in a T10 form factor, rated at 12 volts and 3.78 watts, and serves as the front side marker bulb on the A120 for both covered model years under the Light Duty classification.
The T10 wedge base of the 194 bulb connects directly without a separate metal base, which distinguishes it physically from bayonet-style bulbs used elsewhere on the same vehicle.
The rear side marker position on the International A120 (1957-1958, Light Duty) uses the 97 bulb, which operates at 12 volts and draws 13 watts, making it significantly higher in wattage than the front marker bulb.
The 97 bulb uses a BA15s single-contact bayonet base, a fitting that is mechanically incompatible with the wedge socket used by the 194 at the front position.
The 97 is classified as a variant of the 1156 bulb family, though the two are not directly interchangeable due to differences in wattage and base configuration specifics within that family.
Both the 194 and 97 bulbs conform to ANSI standards recognized in the United States and Canada, indicating standardized electrical and physical tolerances for those markets.
The wattage difference between the front 194 (3.78W) and the rear 97 (13W) reflects their differing roles, with the higher-wattage rear bulb providing greater luminous output suited to rear visibility requirements.