Burkinshaw Fruit Grafting Froe - Measures 6 7/8" and no doubt a sharp cutting edge... Interestingly Burkinshaw advertised back in the 1800s that horticultural knives were one of their specialties... The stamp of A Burkinshaw's Sons probably indicates that is was made post 1880 or 81 after aaron passed away and the sons took over the business. These tools were used for grafting a branch of one fruit tree to another (though I would assume it could be used for any type of tree) - whether to add additional branches of same variety or to create new varieties if I am not mistaken...
(PS - I may just have to put this in the metal handle knife thread too

