This knife is very rare and super old! The Benetfink & Co called themselves a "furniture ironmongers" and in 1852, claimed they could furnish an eight room house for 5 pounds! They had a large store on Cheapside, London, England. They were bought out in 1907, so this knife was manufactured prior to 1907, making it well over a hundred years old. 

Stamped "Alpha Benetfink & Co Cheapside EG" on the blade. 

Still very sturdy as a knife.