International C120 vehicles utilized 194 bulb size for front side marker applications and 97 bulb size for rear side marker installations. 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 C120 uses two distinct bulb types across its front and rear side marker positions for the 1961-1962 model years: the 194 at the front and the 97 at the rear.
The 194 is an ANSI-standardized miniature wedge bulb classified under the T10 form factor, operating at 12 volts and drawing 3.78 watts. Its wedge base design means it requires no separate socket locking mechanism, as the bulb body itself acts as the retention element.
The 97 is an ANSI-standardized single-filament bulb fitted with a BA15s bayonet base, operating at 12 volts and drawing 13 watts. The BA15s designation indicates a single-contact bayonet mount with a 15mm base width.
The 97 is noted as a variant of the 1156 bulb type. While the two share a BA15s bayonet base, they are not universally interchangeable, as physical and electrical tolerances can differ between variants within the same base family.
The wattage difference between the front and rear side marker bulbs on the International C120 is substantial. The rear 97 bulb draws approximately 3.4 times more power than the front 194 bulb, reflecting the higher luminous output typically required of rear marker and signal-adjacent positions.
Both the 194 and 97 bulbs carry ANSI standardization valid across the United States and Canada, meaning replacements conforming to those standards are widely available within North American markets.