Saf-Lok Mk IV high security handcuffs

This is a very rare and discontinued set of high security handcuffs from Australia, made by Australia Defence Industries. These have the original box in rough condition and two original keys. 

This pair sold for $767 after 17 bids. 

Above, the double lock set knobs. These cuffs have three modes: single lock, double lock, and neutral. 

Below, detail of the locking pins which are used in place of a pawl. 

Above, the original box with customs stickers.