This relatively new model has all the qualities of the best selling 5050 but with the added advantage of the double locking which is achieved by inserting the pin which sticks out from the handle of the key into the side of the handcuffs rather than the fumbling around trying to find a very small hole on the side.  The nickel plating is particularly good on this model.

THIS MODEL IS NOW DISCONTINUED AS ALCYON HAD A PROBLEM WITH PRODUCTION SO THEY ARE NEVER TO BE REPEATED.  FOR COLLECTERS ONLY AS WE DO NOT GUARANTEE THE RELIABILITY OF THE DOUBLE LOCKING