Vintage T-Shirt Forum & Community Authentication Appraisals

Purchased this shirt from a local shop for a pretty penny, thought it was a great deal but when I wore it to a vintage event a bunch of people said it’s fake and a handful of people said they couldn't really tell. Would love to hear the community’s input though before I bring it back and ask for a refund.

The screen printing quality is very poor, this is a new print from a vintage blank tee. The original screen printing is usually thick, especially since it's only one color.