Key won't remove from handcuff

I have two pairs of older Peerless handcuffs. The older patent pending model and the newer 1915 model. The patent pending model has a smaller key than the newer model. They are exactly the same except for the size of the keys. When I got both pairs I wanted to see if the keys were interchangeable. The      larger key fit both models, however, when I put the smaller patent pending key in the newer model, it did not open it and the key would not come out. I          would appreciate any suggestions on how to remove this key from the newer model. I am attaching pictures that could maybe help. If you think you could   remove it, I would send it to you and postage paid both ways and any fee that you might request. Also, could these cuffs be shimmied?

George

Hi,
you may want to try this:
1. Try to close the handcuff and turn the key back simultaniously.
2. In case the key is still stuck and the arm comes free apply pressure to the locking pawl. Then the key could be turned out.

Good luck
Björn

PS:
That stuck key looks like a key for McKenzie mitts.

If Bjorn's idea doesnt work, try this. Push the cuff arm so it swings clear of the locking body. Then take a small screwdriver or something similar and push and hold the locking pawl (ratchet teeth connected to the cuff body) down. While holding the locking pawl down, turn the key back. It should come free with a little bit of a wiggle. Ive had to do this when guys have used standard handcuff keys on Harvard Lock cuffs before.
-Richard Knip-

George,
Does the key turn at all? I've been collecting and fixing cuffs for 20 years. As long as you haven't forced the key and severely bent it. Send them to me and I should be able to do it. I'm retired and have lots of spare time, so it will be a pleasure to take this on. I live in Branford, Ct. Message me for my address.

the hinge pin can be pushed out. you will need a hammer and steel pin (shaft of a thin pop rivet). Drill a hole in a wooden block and place the cuff on top with the rivet directly over the hole, when you nock the pin thru, it will have somewhere to go. Slide the pawl while the cuff is still lying flat, so not to lose any pins or springs. You can then see inside and will be able to remove the key. 

George......could I have your email address?

             thanks   Spencer

Allengator56.......could I have your email address? Thanks