mcline71, the paint daubs are identification aids for the assembly line workers. Much like the paint stripes and daubs you see on driveshaft's, springs, etc. It gave them a quick reference so they could compare the part being installed to the build sheet specs.
The red/white on your wheel would normally indicate a 14 X 7" Magnum originally released for the 72 Gran Torino. You should be able to see a "D2OA-1007-LA" on the rear flange area on the rim. The all chrome version was used through 1974. After 74 a wheel with a painted rim that used a trim ring was used through 1980. Smaller cars such as Maverick's and Granada's used a 14 X 6" version.
Hard to place a value, as those wheels were production installed in great numbers and are not as hard to find as the original 15 X 7" Magnum is. A good place to check for market value and how many are out there would be E-Bay.
