The International B120 uses a 194 bulb size for front side marker applications and a 97 bulb size for rear side marker applications. The replacement chart covers 1959 to 1960 model 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 B120 uses two distinct bulb types across its front and rear side marker positions for the 1959-1960 model years, with each position requiring a specific and non-interchangeable type.
The 194 bulb is a T10 miniature wedge type rated at 12V and 3.78W, conforming to ANSI standards recognized in both the United States and Canada.
The T10 wedge base of the 194 bulb relies on spring tension from the socket rather than a locking mechanism, which is a defining characteristic of the wedge base design.
The 97 bulb is a single-filament type with a BA15s bayonet base, also rated at 12V but at a significantly higher 13W output, reflecting its role in rear side marker visibility.
The BA15s designation indicates a single-contact bayonet base with a 15mm collar, a base style that requires a quarter-turn insertion to lock into its socket.
The 97 bulb is noted as a variant of the 1156, meaning the two share a similar base and general construction, though they are not identical and are not listed as interchangeable within these specifications.
The International B120 (1959-1960) specifies the 194 exclusively for the front side marker position under the Light Duty classification, while the 97 fills the rear side marker position under the same classification.
Both the 194 and 97 bulbs conform to ANSI standards applicable to the US and Canadian markets, indicating standardized physical and electrical tolerances for both types.
The wattage difference between the front and rear side marker bulbs is substantial, with the rear 97 bulb drawing roughly 3.4 times more power than the front 194 bulb.