This hardly-used Tuffnut-brand Nutcracker,  made in England by Wakeman Grant of Hampshire in the 1980s is claimed to be high performance, enough to crack tough nuts and leave the shell in the partially-enclosed chamber of the machine.  It comes with the original hard shell box and instructions. 

The cracker is constructed in a heavy duty grey and black plastic with stainless steel inner clamps.

 Unlike other nutcrackers, this one works by gently squeezing the 'more-controlled' lever and clamping action to crack the shells of even the toughest nuts such as almonds and brazils (not macadamias). It has a child safety lock (white on/off button) to prevent the jaws being opened and closed inadvertently. 

It has minor stains, superficial scratches and signs of use.  The instruction leaflet has some mild creasing but is otherwise fully intact. Please refer to the photographs. 

New York Times review: "It looks more like a heavy-duty stapler than a nutcracker, but the Tuffnut makes it easy to shell nuts without pulverizing them. Tuffnut's compression spring handle exerts more pressure with more control than most other nutcrackers can."