International L112 vehicles utilized 194 bulb size for front side marker applications and 97 bulb size for rear side marker positions. The replacement chart covers 1950 to 1952 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International L112 uses the 194 bulb for front side marker positions across the 1950-1952 model years, while the 97 bulb serves the rear side marker positions across the same span, both under a Light Duty classification.
The 194 is an ANSI-standardized miniature wedge bulb of the T10 type, operating at 12 volts and drawing 3.78 watts. The T10 designation refers to a tubular bulb body measuring ten-eighths of an inch in width, with a wedge base that seats directly into a socket without a separate metal base.
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 cap with a 15mm base width.
The 97 bulb is noted as a variant of the 1156. While the two share a BA15s bayonet base, they are not fully interchangeable, as the 97 and 1156 differ in wattage and pin indexing configurations, which affects fitment in position-specific sockets.
The wattage difference between the two bulbs used on the International L112 is substantial. The rear-mounted 97 draws approximately 3.4 times more power than the front-mounted 194, reflecting the greater luminous output typically required of rear marker and signal positions.
Both the 194 and 97 carry ANSI standardization recognized in both the United States and Canada, meaning their physical and electrical specifications conform to a shared North American regulatory framework rather than a manufacturer-specific standard.
The wedge base of the 194 bulb differs fundamentally from the bayonet base of the 97. Wedge-base bulbs rely on the glass envelope itself to make contact within the socket, whereas bayonet-base bulbs use a metal cap with side pins that lock into the socket with a push-and-turn motion.