International S1824 front side marker bulbs use 168 or 1895 bulb sizes, while rear side marker bulbs use 168 size. The replacement chart covers vehicle production years from 1980 to 1985 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 S1824 front side marker uses two distinct bulb sizes across the 1980-1985 model years: the 168 and the 1895. These are not interchangeable, as they differ in both physical size and wattage.
The 168 bulb is an ANSI-standard miniature wedge type in a T10 form factor, rated at 12 volts and 4.9 watts. It is used in the front side marker positions for the 1980-1981, 1983, and 1985 International S1824.
The 1895 bulb is an ANSI-standard miniature wedge type in a T5 form factor, rated at 12 volts and 0.9 watts. It is specified for the front side marker on the 1982 and 1984 International S1824.
The T5 form factor of the 1895 is physically smaller than the T10 form factor of the 168. Substituting one for the other in a front side marker socket would result in an incorrect fit.
The wattage difference between the two front side marker bulbs is substantial. The 168 draws 4.9 watts while the 1895 draws only 0.9 watts, meaning the two bulbs produce noticeably different light output levels.
Both the 168 and 1895 bulbs conform to ANSI standards recognized in both the United States and Canada, indicating they are governed by a shared North American specification framework.
The rear side marker position on the International S1824 uses the 168 bulb uniformly across all listed model years, 1980-1985, with no variation between years.
Because the front side marker alternates between the 168 and 1895 depending on the model year, the specific year of the vehicle is a critical factor when sourcing a replacement front side marker bulb for the International S1824.