Going through some ammo cans and found these in my stash
I have many Okay ind mags but none with Orange followers just curious about them no cage code or date on them
second is a 20 round with metal follower and floor plate with
M16/M16A1 Universal Inds.Div.

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I have not looked inside but I will

I posted some photos here of what to look for as far as internal markings go on a pre-ban Okay magazine. You should find something similar inside yours.

As far as the orange followers go, I have a couple bags of followers like those that I bought probably 15 years ago before my 2005 Iraq deployment. I put those followers plus Wolff springs in my issued mags. Assuming they're the same, the followers are identical to the mint green GI follower, just orange to make them more visible (the idea being that they're easier to see when empty). One of many things in my gear collection that have been superseded by newer technology (Magpul followers, in this case), but they should still work just fine.

Yes I have replaced all the followers in my GI style mags with magpul followers also