International C1300 Back Up Light Bulb Size

The International C1300 back up light requires a bulb size of 199 for the specified lighting component. Data for the bulb size covers the range from 1963 to 1964.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1963-1964	199 (Light Duty)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The 1963-1964 International C1300 uses the 199 bulb for the back up light in its Light Duty configuration.
The 199 is an ANSI-standard bulb recognized in both the United States and Canada, operating at 12 volts with a 21-watt output.
It is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail duties.
The 199 uses a BA15s bayonet base, which is a single-contact bayonet mount that locks into the socket with a twist.
The 199 is a variant of the 1156 bulb, though the two are not necessarily interchangeable in all sockets due to potential differences in pin indexing and physical tolerances.