Two Keys, by Jean Claude Constantin. Acquired in 2009. Two-layered maze with a rivet that can be moved to an exit point (the rivet can be removed). For a review of this puzzle, visit https://mypuzzlecollection.blogspot.com/2012/02/two-keys.html
Postage to be calculated after the auction, so please don’t pay until I send you the total with postage, which you can Paypal to tomjolly2020@hotmail.com. Preferably to Friends and Family.