Tower Detective

 These are Tower Detective handcuffs from Union Hardware. They sold for $67 after 2 bids. 

Here is another recent Tower Detective from Tower, with the three bent ring chain, similar to some Towers handcuffs and Towers single/double/ lock leg irons. This pair has a nice plating and sold for $197.50 after 3 bids. 

These cuffs are also known as Pinkerton, as they were supposedly used by those guys back in the old days. They are a lightweight cuff with a wide adjustment. They don't double lock. The Union Hardware version has the same type of swivels that the Bean Prison handcuffs in my other post have. 

I have Towers Double Lock Handcuffs with a single long link like the topmost. My Pinkertons are actually like the second photo, albeit with a fair bit more wear; they have three bent links. I got them for $135 with 3 keys in 2020.

I've also read about a Tower Detective imitation cuff which is by all accounts of comparable quality but has several fairly obvious differences, primarily a step on the shackle vs not. There's a post detailing this on the Tapatalk forum but that is such a hard site to search through.