International S1955 front side marker bulbs utilize 1895 and 168 bulb sizes, while rear side marker bulbs use 168 size. The replacement chart covers 1981 to 1989 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 S1955 uses two bulb types across its side marker positions: the 1895 and the 168, both of which conform to ANSI standards recognized in the United States and Canada.
The 168 bulb is the more widely used of the two across the S1955's side marker specifications, appearing in all nine rear side marker positions from 1981-1989 and in the front side marker positions from 1982-1988.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, making it a higher-wattage unit relative to the 1895.
The 1895 is a T5 miniature wedge bulb rated at 12V and 0.9W, representing a notably lower power draw than the 168.
Although both the 168 and 1895 share the same miniature wedge base design and 12V operating voltage, their wattage and T-size ratings differ, and the two are not interchangeable.
The International S1955 front side marker uses the 1895 bulb for the 1981 and 1989 model years, while the 1982-1988 model years use the 168 bulb in that same position.
The front side marker position on the International S1955 is the only location in these specifications where the 1895 bulb appears.