Challenging the mind

A number of years ago, I used to collect these copper wire puzzles and loved trying to solve them. I think I solved every one of these, including the very difficult triangular one with all the rings on the second lowest row (you have to remove either the handle or a ring from each of these puzzles). They are hanging on the narrow wall in my hallway. Some of you may be familiar with the Handcuffs puzzle (middle of second row down) - I have seen this in various forms.