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Anyone familiar with OKay Industries magazine dating?

924 views 6 replies 6 participants last post by  ITSATRAP 
#1 ·
Did some searching online and found that my 2x Okay Industries preban 30 rounders have markings on the inside.

One is stamped inside K7 87 on one side and 07 87 on the other.

The other is stamped inside K5 86 on side side and 05 86 on the other.

I am hoping this means they were manufactured May '86 and July '87 respectively.

Any confirmation on this would be appreciated.
 
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