Cerebral Rings Puzzler

Mag-Nif Inc., 1989.
(plastic, 4.1 inches by 1.75 inches high)

Six red buttons can be pushed into one of three vertical positions; when the correct combination of positions is achieved, the puzzle comes apart into three sections. Here are views of the bottom of the puzzle and the bottom of the box, which invites you to purchase a solution sheet:

Solution: Leave every other button at the top position and push the other three to the middle position (none of the put-ons are pushed to the bottom position). The sections can then slide apart by pushing two opposite places on the top in directions roughly 90 degrees to each other.