I personally have never found Side By Side shirts to be particularly exciting. The demo shirt is cool, but it does not move me. There are also a ton of bootlegs out there, and you can never be too sure about what you are getting.
With all that said, I believe you are looking at an original, old school Revelation Records era Side By Side shirt.
There is the different picture on the back versus the new prints, and that ever so telling Stedman tag. This one looks good folks!
the only one i like is the one i have (boot of course) of the skinheads doing the can-can.
I think all OG sbs shirts suffer from being super giant! I got one for 10 bucks las year at a used clthes shop that someone decides to tailor but on cut the bottom making it a short and wide. Bummer
Sadly in the late 80s most of us east coasters cut the bottoms off our shirts. None of us knew that without a hemmed bottom the shirts would roll up another 2 inches….oh well.