All five rims were identical if the car (68) came with standard wheels not the style steel.
Also a rare option was space saving spare.
By the way those wheel covers in the pic are the original basic covers. I for one like them better than the optionals. If they're in good condition treat them well.
I believe the KH means Kelsey Hayes. The original steel wheels were stamped near the center front area. The inside width for V8 cars was 5". The offset (back spacing) varies depending on application.
My '64 1/2 vert. Ordered May '64. D code 4 speed, handling package, caspian blue, accent group, Ford blue manual top.
'68 vert. driver. Owned since Apr '78. C code AT, AC, PS, P disc B, PT lime gold, standard black interior and top. NOS RF fender and left quarter.New top and folding glass.