Plymouth Cranbrook License Plate Bulb Size

The Plymouth Cranbrook license plate light requires a 63 bulb size for proper illumination of the rear registration area. Data for the specific component covers the period from 1951 to 1953.

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
1951-1953	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

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Additional Notes

The Plymouth Cranbrook uses the ANSI 63 bulb for its license plate lighting across the 1951-1953 model years.
The 63 bulb operates on a 12-volt electrical system, consistent with the standard automotive voltage adopted broadly in the early 1950s.
At 0.63 watts, the 63 bulb draws a very low current, which reflects its role as an indicator-class lamp rather than a primary lighting source.
The 63 bulb is a single-filament type, meaning it serves one lighting function only, with no secondary filament for a dual-intensity mode.
The BA9s base is a miniature bayonet fitting with a 9mm cap width, commonly found on small indicator and license plate bulbs of this era.
The 63 bulb carries ANSI standardization recognized in both the United States and Canada, placing it within a defined North American specification framework.
Because the BA9s base is a specific miniature bayonet format, substitution with bulbs using different base types would result in a physical fitment incompatibility regardless of voltage or wattage similarity.