All CLOTHING FOR ENJOYMENT ACE MEN'S WEARING!
This is a full page advert by a Japanese artist named Eiiche Hasegawa which featured in the January issue of Gebrauchsgraphik International Art magazine from 1971. It was a prize-winning poster design in the 18th annual exhibition of the Japan Advertisement Artist's Club Tokyo. Unfortunately apart from the name credit there wasn't any other information about the artist and so far I haven't been able to track down anything. Fantastic work though, I like the mix of collage and graphics...and I'd be quite surprised if there isn't a psychedelic colour version of it out there somewhere waiting to be found.
Image scanned by Sweet Jane from Gebrauchsgraphik International Advertising Art January 1/1971. Poster design by Eiiche Hasegawa.