The International C110 uses 198 bulb size for both front and rear turn signal applications. The replacement chart covers 1961 to 1962 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 198 bulb is the sole bulb type listed across all turn signal positions for the International C110, appearing in both the front and rear turn signal applications for the 1961-1962 model years.
The 198 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used across the United States and Canada.
It is classified as a miniature wedge bulb with a T5 designation, where "T5" refers to a tubular glass envelope approximately 5/8 of an inch wide, characteristic of small-format automotive bulbs.
The 198 bulb operates at 12 volts and draws 2 watts, placing it at the low end of the power range for automotive signal lighting.
The wedge base design of the 198 bulb means it is held in its socket by the tension of the base contacts rather than by a bayonet or screw mechanism, which is a common trait of miniature bulbs in this class.
All four turn signal positions on the International C110, front left, front right, rear left, and rear right, share the same 198 bulb specification across both listed model years, indicating a uniform fitment across the vehicle.
The Light Duty classification noted alongside each entry reflects the vehicle's weight or usage rating, which is a relevant factor when cross-referencing bulb fitment across different trim or duty levels of the same platform.