Something that’s been sitting on my desktop for weeks, the artist is called Hamish, who I’ve never heard of but he’s doing a nice Rick Griffin impersonation. Can’t remember where I found it on the web, possibly The Rock Poster Society group on Facebook.
It’s the back cover of edition 2 of HomeGrown, “Europe’s first dope magazine”. He did some of the interior art/lettering as well. The only other thing I’ve seen by him is a poster for a Man gig at The Roundhouse in 1976, which is closer to Robert Crumb than Rick Griffin.