This is a near mint example of the AHC N-200 oversized handcuffs. This set with original keys, box, and all paperwork, is listed at $499.99 which is a bit high even with the box. I could see these selling for $300-350 but there have been several examples like this which have gone for little more than pennies recently.  Above, these are manufactured with the same pattern as the standard L-100 leg irons. The only difference is the length of the chain and the model number marking.  Above, a rare Judd leg iron from the Mattatuck company.  Above and below, close up detail of the makers mark and model information