I'm trying to figure out the date of this wheel. Bolt pattern is 4 1/2. If I measured correct, the backspace is 3 1/2.
My guess would be Sept 9th 1969.
K1 = Kelsey Hayes Plant 1
9 = 1969
9 (valve stem) 15 = September 15th
50 = 5.0 width
Is my amateur interpretation.
:iagree: I meant Sept 15th, but got a few to many 9's in there. lol :D