The International 1300D uses a 198 bulb size for both front and rear turn signal applications. This replacement chart covers vehicle production spanning 1969 to 1970.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 1300D uses bulb size 198 for both the front and rear turn signals across the 1969-1970 model years.
The 198 bulb is an ANSI-standardized type recognized across the United States and Canada, which reflects a standardized electrical component used in North American vehicle manufacturing of that era.
The 198 is a miniature wedge bulb, classified under the T5 designation. The T5 designation refers to the bulb's tubular shape, with a width of 5/8 of an inch, and the wedge base means it is held in its socket by the glass envelope itself rather than a separate metal base.
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. This wattage is consistent with a small indicator-type application rather than a high-output lamp.
The Light Duty classification noted in the specifications applies to both the front and rear turn signal positions for the 1969-1970 International 1300D, indicating the vehicle trim or configuration to which these fitments correspond.
Because the same bulb size, 198, is specified for both the front and rear turn signal positions, the same physical bulb serves both locations on the International 1300D without substitution or variation between positions.