Hamburg 8 reproduction handcuffs. The handcuffs can be opened without the key when folded. When unfolded, the bows lock into place. Constructed of nickel plated brass. Inside perimeter is 7 3/8″. Weight: 20 ounces. 2 keys stamped Chicago Handcuff included.
Available for $47 at Handcuff Warehouse: http://www.handcuffwarehouse.com/chmo19ha8ha.html
