Need help with Date Code ID for 68 chrome road wheel

[Hotrod20]

What date would this 14 x 5 1/2 JK chrome road wheel be?
Thanks for the help.
Hotrod20

 

[Dave6T4]

I would think May 4, 1968.

 

[R413]

M is motorwheel
4 is plant #4
8 is 1968

 

[shooter65]

I'm thinking August 4, 1968. To the right of the M4 with the year under it, "8" the next two digits are 8 4 which I believe are Month and Day.