I just picked up six of these brilliantly colorful pattern paintings on lightweight board and think they are just gorgeous. They are hand numbered in pencil at top center (this one is 4; the highest number of them is 43, so there were once a whole lot of these). My guess is that they were a (well done) art/design school exercise, but at some point, also in pencil, prices ranging from 60 (.60) to 1.75 were added at top right, reiterated with hand-written price stickers on the back...so at least at some point a fair while ago they were offered for sale, which makes me wonder a bit if they were in originally made with that intent? Or were plans/sketches for designs to be painted onto something else? At any rate, they’re just great looking frame worthy things now, and also stiff enough to just prop somewhere. And the colors—I believe acrylic paint—are even brighter and lusher than photos capture.
This one measures just shy of 9 1/2" across and 11 1/8" tall. Good condition, with a little bumping and small tear to the board at top right and a little minor staining.