i saw this show - i loved it. it forever cemented live skull into , well, my skull.
is thalia z the gal bassist in that band? a friend of mine worked at penguin books for a long time and she was a staff graphic designer who worked down the hall. when my friend geeked on who she was, she was sort of surprised and embarrassed and pleased that anybody knew.
these were all made in the late 70's and into the early 80's. quick-print and analog copiers all have certain looks to them that i'm extremely familiar with. also, the paper in use back then is VERY different from our paper today (thanks to desktop compatibility.
combine that with age, yellowing and wear (pin holes, tape stains, telephone pole creosote, rain wrinkles, etc. etc.) and i can usually tell at a glance whether it's real or not. even old folds made years ago compared to folds made recently look very different.
i've had a lot of people come to me to authenticate "real punk posters". if i can't figure it out, that means it's probably fake.
once in a while you see a "mint" punk poster, but they look fake because they're so clean and tidy. the best way is to only collect used punk posters and not "mint" ones. posters that have been "danced" (in museum circles, that's how they refer to african masks that have actually been used in ceremonies rather than sold to tourists) may be the only way to truly authenticate punk posters.
that's really funny to think that the only way to tell if it's a 'real' punk poster is whether it's been damaged in use. punks didn't save "mint" posters. that was considered posing.
if had a load of free money, i'd just buy old black flag and circle jerks posters (etc.) on the web. i'd just buy shawn kerri and hernandez and pettibon. that stuff is still so cheap that is amazes me. you can get all of pettibon's poster output for pennies (metaphorically speaking).