The markings are:

14 x 7 JJ K 1
5

The 5 is under the K 1

The markings are:

14 x 7 JJ K 1
5

The 5 is under the K 1
none of that is a date code, the code is on the face surface of the rim on either side of the tire valve stem. will look like MI 9 10 15 YA

K 1 5 in triangular pattern, isn't that kelsey hayes, plant 1 rhomulus, 1965. Think there should be a date code and an application code on the rim near the valve stem hole. I take it the 14x7 JJ is on the inside of the rim.

Okay, here is the codes next to the valve stem:

K 15 2 "VALVE STEM" 17 UD

Thanks, Jim

2 17, probably feb 17 of 1965 or 1975 because of the K 1
5

Unsure of the code UD. Are you sure of the 14 x 7 JJ ? If so probably a 1975 rim, don't think there were any 7" rims in 65.