Seller backside_kickflip says this is a original Minor Threat shirt. Now, I’m not an expert on Minor Threat merch so I can’t say for sure myself, but judging from the plethora of pics he has up of it detailing every faded stitch and burst seam (which is greatly appreciated), it certainly is old enough to be just that.
I would be remiss to not mention that he makes sure to mention that this is an original and “not a cheesy bootleg or a clever THAILAND or ASIAN warehouse replica“. Why is this notable? His location is Bangkok, Thailand. Smart move on his part; that location usually sets off alarm bells.
Minor threat only had one offcial shirt and this is not it. Plus that tag is at least from late 90s
one thing for sure, sometimes, here in Asia, you can find old/original shirt on flea market, some of them is unpredictable, just like mine –> http://1.bp.blogspot.com/_gYX3J-Fy6LE/SxPioc2SPZI/AAAAAAAAAHM/s74d4WQuJOc/s1600/shelter.jpg