Someone added Ford spinners along the way...but I am trying to determine what year/model Merc. they originally came from. Thanks!
They ARE '56 Mercury caps....just the standard non-flipper style with later Ford 3 bar flippers added.. The '56 Merc 4 bar flippers were most often seen on Montclair models......cheapy Medalist had poverty caps. So, basically three caps were used on 56's. Ray
They look like the ones on my 53 (Canadian - my first car, a hand down that went through several family members)).
The '52/ '53 caps are similar at a glance, but with one significant difference. The '52/'53 have a convex center (tapers outward) whereas the '56 caps are concave. They both have concentric rings and a 'Mercury' head emblem stamped into them. Ray