The International C122 uses a 194 bulb size for front side marker applications and a 97 bulb size for rear side marker applications. The replacement chart covers 1961 to 1962 vehicle 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 C122 uses the 194 bulb for the front side marker position across the 1961-1962 model years in Light Duty trim.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards recognized in both the United States and Canada.
The T10 wedge base on the 194 bulb requires no locking mechanism, as the wedge-shaped base itself holds the bulb in place within the socket.
The rear side marker position on the International C122 (1961-1962, Light Duty) uses the 97 bulb, a notably higher-wattage unit than its front counterpart.
The 97 bulb operates at 12V and 13W, making it roughly three times more power-consuming than the 194 used at the front.
The 97 uses a BA15s single-contact bayonet base, a base type that requires a push-and-twist motion for installation and removal.
The 97 is described as a variant of the 1156, meaning the two share the BA15s bayonet base but differ in wattage, which makes them non-interchangeable in applications where light output or circuit load is a factor.
Both the 194 and 97 conform to ANSI standards, indicating their electrical and physical specifications are governed by a standardized classification system used across North American automotive applications.