1957 Day - Nite rear view mirror

[wkvasnicka]

My 1957 Ford Accessories Manual shows a day night (with tab) inside non-glare mirror as having part number B5A-18400-A. This would be a 1955 part number. Is this a missprint ? It seems to me that the 1957 mirror would be wider than the 55 or are they the same?

Thanks in advance for any information you may provide.

[SkylinerRon]

That is the correct mirror.
The mounting is the same 55-up.

Ron.