$150.00
The PrimoGraf is a hand cranked drawing machine. Using wooden gears with prime number based gears an infinite array of drawings can be made. It comes complete with 7 gears, 2 set of rods and penholders so you can create many variations. Different setups can be achieved instantly by simply picking different holes.
Made of walnut, basswood, and solid brass. All the wooden parts and gears are made in our studio here in Portland, Oregon. Since we make our toys by hand in small batches we are sometimes temporarily out of stock. If you order we will make another batch and ship within 2 weeks.
See it in action in a Youtube video: