picked up a pair at a flea market. Internet searches turn up nothing. They seem consistent with Hiatt Thompson cuffs, but with a different style of chain hinge. was told they were what Chicago PD uses, but that contradicts what I found here.
I took some pics, but without a photobucket account its going to be tough to post them. not sure I want to open an account just for this. I can email them to anybody whose interested.
The construction, keyhole position, dimple position, etc... are all just like the Hiatt-Thompson cuffs, but the hinging is like a Peerless 301...multiple links of bicycle style chain. There are 2 Independent locking pawls. Each side of the...what do you call it? The moving part with the teeth? each side has a machined groove, again same as the HT cuffs.
They have a low serial number...in the two hundreds. Engraved "PRO-MAX" in large outline letters. A small "2200" below that. They weigh about 10.5 oz.