Gotta give Coppola credit...the 'Gurkha kookree' is mentioned in just two places in Bram Stoker's novel. No film-maker before FFC picked up on it. In the book, Stoker nearly has Dracula struck by the 'kookree' in the hands of Jonathan Harker, in a scene in England. And Harker again has the 'fearsome' weapon at hand in the climactic battle scene at Dracula's castle in Transylvania, where (in the book) Harker strikes off the vampire's head.
The Coppola version is about the closest adaptation to film of this grand old gothic classic.
I've seen the film several times, and the knife used in the battle scene sure looks like an HI blade: at a guess, an Ang Khola.
Bill...c'mon, 'fess up. Didn't you supply the knife for the film????