oddity on a 1923 S LWC....

I purchased a collection to liquidate that included almost a full wheat set (no 14D, 22 etc.) This one 1923S appeared to have a strike thru wire on the reverse until closer exam. My next thought was intrinsic metallic inclusion . Now since I have never seen one I am second guessing myself. There are sure a lot of straight lines back there and a gouge by the EPU .
Any thoughts?
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