Color and Pattern Study on Lightweight Cardboard - No. 10 vintage brass key-holder with a little wear/aging visible

with a little wear/aging visible on the face and belly

paper size 5 7/8” x 9 3/4”

8 1/4" diameter x 3 1/8" tall and in very good condition

It's a vintage 1:10 scale model of the 15th c Gutenberg printing press

Considering title

Color and Pattern Study on Lightweight Cardboard - No. 10 vintage brass key-holder with a little wear/aging visibleI 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 10; 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