International 1210 Back Up Light Bulb Size

The International 1210 back up light requires bulb size 199 or P21W depending on the specific application. Data for the bulb size covers the range from 1971 to 1973.

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
1973	P21W
1971-1972	199 (Light Duty)

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The International 1210 backup light specifications cover model years 1971-1973, with two distinct bulb types listed across those years.
The P21W is an ECE-standard bulb used in European and worldwide automotive applications. It features a single filament and a BA15s bayonet base, rated at 12V and 21W.
The 199 is an ANSI-standard bulb used in North American automotive applications. It also features a single filament and a BA15s bayonet base, rated at 12V and 21W, and is a variant of the 1156 bulb.
The 1973 International 1210 uses the P21W bulb for the backup light position.
The Light Duty trim of the International 1210 uses the 199 bulb for model years 1971-1972.
Although the P21W and 199 share the same BA15s bayonet base and identical voltage and wattage ratings, one follows ECE standards and the other follows ANSI standards, which may affect regulatory compliance depending on the market.
The BA15s base type found on both bulbs is a single-contact bayonet fitting, which is standard for single-filament signalling applications in automotive lighting.
The 199 bulb's classification as a variant of the 1156 means it shares core electrical characteristics with that widely available North American bulb family, though fitment should be confirmed against the specific trim designation before substitution.