1969 Camaro AD rally wheel question

[suturb110]

I have an early Van Nuys 1969 Z28 Camaro built 09D 1968.  Four of the wheels were clearly K 1 8 8 9.  In searching for a spare tire wheel I came across an AD wheel stamped K 1 8 8 19.  Does anybody know if the valve stem holes drilled before and after wheel date code stamping?  Attached are pictures.  Thanks, Mike

[KurtS]

The piercing of the hole should have happened earlier in the process.
Not uncommon to see a digit missing in the valve stem hole.

[firstgenaddict]

The 8/19 wheel is also well within the parameters to have been in your car when it came off the assembly line.