The International S1924 uses 168 and 1895 bulb sizes for front side marker applications, with 168 bulbs specified for rear side marker positions. The replacement chart covers 1980 to 1982 vehicle production years and details bulb size specifications across this range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1924 uses two distinct bulb types across its front and rear side marker positions: the 168 and the 1895, both of which conform to ANSI standards recognized in the United States and Canada.
The 168 bulb is a T10 miniature wedge type rated at 12V and 4.9W, making it the more prevalent of the two bulb types across the S1924's side marker positions.
The 1895 bulb is a T5 miniature wedge type rated at 12V and 0.9W, representing a notably lower wattage output than the 168.
The T10 and T5 designations refer to the outer width of the bulb envelope, with T10 indicating a wider profile than the T5. These two sizes are not interchangeable despite both using a wedge base design.
The rear side marker position on the International S1924 uses the 168 bulb across all three model years covered, spanning 1980-1982.
The front side marker position on the 1980 International S1924 uses the 1895 bulb, which differs from the 168 bulb specified for the 1981-1982 front side marker position.
The wattage difference between the 168 (4.9W) and the 1895 (0.9W) is significant enough that substituting one for the other would produce a visibly different light output and could affect circuit load compatibility.