Hiatt model 104 Darby handcuffs

This is a nice pair of Darby handcuffs. The 104 design lasted many decades; this iteration was marketed more towards collectors by this point.

This set with original key and box was listed for $128 or best offer and an offer was accepted. 

You can see these are size 2 1/4. They had several other sizes including 2 1/8, 2 3/8, and 2 1/2, as far as I can tell.