Grab bag of rare handcuffs

Here is a cool collection of handcuffs which was listed at $350 or best offer. There were no keys included. 

Above, the pile has been untangled and we see a few Towers Double Lock, Towers Detective, a Bottleneck, a Bean Cobb, Bean Prison or Patrolman, and a Darby. 

Above, the Darby is a very rare Dowler example. Too bad the key is missing.