International S112 utilizes a 194 bulb size for front side marker applications and a 97 bulb size for rear side marker positions. The replacement chart documents bulb specifications across 1956 to 1957 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S112 uses two distinct bulb types across its front and rear side marker positions for the 1956-1957 model years: the 194 at the front and the 97 at the rear.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, and is designated for the front side marker position on Light Duty trims.
The T10 wedge base of the 194 requires no locking mechanism for retention, as the wedge shape itself holds the bulb within its socket.
The 97 is an ANSI-standard single-filament bulb rated at 12V and 13W, and is designated for the rear side marker position on Light Duty trims.
The 97 uses a BA15s bayonet base, which is a single-contact bayonet fitting that locks into its socket with a quarter-turn motion.
The 97 is described as a variant of the 1156, meaning it shares the BA15s bayonet base but differs in wattage, making the two bulbs not directly interchangeable despite their physical similarities.
The significant wattage difference between the 194 (3.78W) and the 97 (13W) reflects their respective roles, with the higher-wattage 97 providing greater output suited to rear marker visibility.
Both the 194 and 97 are recognized under ANSI standards applicable in both the United States and Canada, indicating standardized performance and dimensional specifications across North American markets.