I can't talk about blade geometry with any degree of competence, just in general terms, and that's a sign of my lack of knowledge of the subject in any formal sense.............
Probably best to describe what I'm saying by calling it a chisel edge, kept that way with what we here call a coffin stone, a carborundum jobby I think, and the boys that work at the hedging and make money from it would strop as well; although it's now all powertools and silky saws...............
He uses a cigar stone to sharpen.