OHIO WING GROUP 4??

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  I can find no history on this patch.  I am only assuming from the large numeral four that it must have represented Group Four.  Obviously from Ohio Wing.  Judging from its appearance, it is fairly old, probably dating back to the sixties or older (my best guess).  This is a fairly large patch compared to most unit patches, measuring 4 5/8" wide and 5 3/8" tall.