Bean Prison, Iver Johnson handcuffs

Here is a nice pair of Bean Prison Handcuffs. The seller states this is confirmed by weight as compared to the lighter but otherwise similar Patrolman model. 

This pair sold for $180 with 1 non original key. The seller states that the bows are slightly misaligned, requiring assistance opening when fully closed. The lock activating buttons work as intended. 

Below, close up detail of the swivelling clevises and hinges. 

Below, a very similar pair, this one from Iver Johnson. Iver was an inventor and gunsmith involved in the firearms industry as well as transportation. He founded the Iver Johnson Arms & Cycleworks, where he produced bicycles, motorcycles, and more. He formed a manufacturing agreement with Edward Bean, who often licensed out his designs to manufacturers, in order to produce these based on the Patent Bean had registered, (#268,171) but Iver also made enough changes to the design that he applied for his own patent, (#308,075). 

This pair SOLD for $261 after 8 bids. The nickel plating is worn but these are in working condition. 

Above, close up detail of the locking notches. These cuffs require a two bitted key, as there are two locking "pawls" that engage these angled holes. Note the central rail that engages with the lock case; similar designs are still used today for high security multi pawl swing through ratcheting handcuffs.