I got 4 of these out of an estate. This pair have still never had tires on them and have  the original, tattered 1974 dated boxes. The other pair (listed separately  had tires mounted and then removed but were never run on a car. Unfortunately, they have been in a barn since 1974 and have some corrosion issues. The darkened specks and spots in the pictures are corrosion to the aluminum so it will take a good degree of effort to polish it back out. It is what it is, look the pictures over good -the corrosion isn't  super deep but they aren't just going to polish up by hand.

Backspacing is 3.5" from the mounting flange to the edge of the rim