Here's a recent fake Hook-ups tag from Thailand. I also did a quick search through the available Hook Ups tees on eBay and Etsy, and couldn't find another one without the size on the tag like yours. One thing that struck me about the fake one below is that it's sewn under the flap, and not just sew...

Hi. I hope everyone is doing well. I need help from you guys on this vintage hookup tee. I have 2 of it. But 1 of the tee, the hookup tag does not have the Made in USA wording at the behind of the tag and does not mention the size at the tag. Is the item legit or fake? Can someone help me to declare...