Mercury Montclair License Plate Bulb Size

The Mercury Montclair license plate light uses bulb sizes 63, 67, 97, and 1155 depending on the specific application. Data for the provided bulb sizes covers the range from 1955 to 1968.

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
1968	97
1964-1967	1155
1956-1960	67
1955	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	1155
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Mercury Montclair license plate bulb specifications span model years 1955 through 1968, with four distinct bulb types represented across that range: the 97, 1155, 67, and 63.
The 1155 is the most frequently specified bulb in these records, covering the Mercury Montclair from 1964 through 1967. It is an ANSI-standard single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
The 67 bulb covers model years 1956 through 1960 and shares the same BA15s bayonet base and 12V operating voltage as the 1155, though it draws considerably less power at 8W.
The 97 and 1155 are both classified as variants of the 1156 bulb and share the BA15s bayonet base, yet they differ in wattage. The 97 is rated at 13W while the 1155 is rated at 21W, making them electrically incompatible as direct substitutes despite their physical similarities.
The 67 is also described as a lower-wattage variant of the 1156 and uses the same BA15s bayonet base. Its 8W rating places it well below both the 97 and 1155, which is relevant when evaluating socket and circuit compatibility.
The 1968 Mercury Montclair uses the 97 bulb, which at 13W represents a lower wattage than the 1155 used in the immediately preceding model years, despite both sharing the BA15s bayonet base form factor.
The 1955 Mercury Montclair is the only model year in these specifications fitted with the 63 bulb. Unlike all other bulbs listed, the 63 uses a BA9s base rather than a BA15s base, making it physically incompatible with sockets designed for the other bulb types in this dataset.
The 63 bulb is also the lowest-rated bulb in these specifications at 0.63W, a figure substantially lower than the 8W to 21W range seen across the other three bulb types.
All four bulb types listed carry ANSI standardization applicable to both the United States and Canada, meaning each has a defined and consistent specification recognized across North American automotive applications.
The BA15s base found on the 97, 1155, and 67 bulbs is a single-contact bayonet fitting, which is distinct from the BA9s base on the 63. These two base types are not interchangeable, as they differ in both physical size and contact configuration.