I think this tag was put in in Syms stores... They had reputable makers make lower quality versions of their clothes, sold them with the good maker's tags, then (usually) cut the good maker's tags out to make you feel like you were getting a special exclusive deal that the maker's didn't want people to know about. Really the maker's just didn't want their brand name on inferior quality goods.
...AAAAND thank you to the folks who chimed in on this one... I had been tempted to pick them up but resisted, not knowing what it was / meant. Shall never kop.