bjb - no one has done any documentation of any of the seattle stuff (documentation, not collecting. there are lots of collectors) except me and a fella name of scott mcdougall. we were working on a book about them, but we couldn't find anybody to even print it as a brochure. seems locals didn't give a rat's ass and the larger publishers are always predge toward california for psychedelic history - like they don't want to admit there were others close by doing stuff, too.
we gave up and sold the collections. i still have slides of all of it, but nobody has a decent 'complete' collection, and certainly no institution in the northwest ever bothered collecting posters of any kind at all. the only exception is the experience music project - but their curatorial staff is so fucked up and the collections so random and scattershot that there is NO organized effort to work up a decent history of any nw posters at all. their collection is essentially a 'garbage dump' approach. nobody there is even sure what it is they have. too bad.
the earliest 'psych'stylings we found up there were some early 'jug band', beat poet and folk singer posters at early coffee shops that were definitely going over the top into psychedelia. i even found some 'folk' posters from the very early sixties that were 'psych' style LETTERPRESS posters! amazing looking.
maybe i'll post them someday, but since this site doesn't show dates, it won't mean anything to anybody.