Odd waist/wrist Combination and comparisons

This is a very basic "blacksmith" style restraint i.e..made of thick, wide flat bar stock with barrel type hinges and a simple 2 hole closure for a bolt, padlock or rivet. Sold for $100 after 1 bid. There is no key per se as all that is required is the correct wrenches or socket. 

Below, inner surface detail of the waist restraint and bolt closure.

Above, close up detail of the wrist shackle with bolt closure. These are non adjustable heavy duty shackles. I'm unsure about the provence or age of anything this style. It's not commonly seen but there are one or two others that are similar. If I had to guess I would say these are relatively modern. 

Below, a somewhat similar pair. They look old but again I know almost nothing about these. They're on eBay, starting bid $198 or best offer.

Below, close up detail of the two part cuff and the unique chain link. It looks like the second link is a bent closure.

Above, a similar pair with a more sophisticated locking arrangement. If I was gonna guess I would say this pair is the most likely to be a genuine antique. I really don't know though. It's for sale on a set along with a Towers Double Lock Leg Iron and a Providence Tool Company handcuff with a broken locking end on one cuff. No keys. 

I don't know. From this angle they look more crude. I guess that's what they're going for with this design. 

Below, the damaged Providence Tool Company handcuffs in the same lot. These are pretty rare, and this is a good looking set. You can tell it's Providence Tool Company by the low, round end caps, the thin profile of the hinge, and the angle of the hinge, as well as the fact that many or most Providence Tool Company Darbys develop a deep patina unless they are plated. I'm not certain they even did any plated cuffs. 

Below, close up detail of the damaged shackle end. It was either forced open, or maybe slammed shut while the inner lock tube or spring was corroded or partly seized in place. Looking closely you can see the locking tab is still intact; this would align with my second theory. I've filed the tip of a few Darby's before to help them close smoothly; if the spring is stiff and the cuff is not aligned properly, I could see this happening. 

Technically this could be repaired.