another arab knife with the primary edge on the inside of the curve is the north west african koummya
also a much shorter false edge on the outside of the curve. this one was marked tunisia 1933 by a previous owner via a small nail punched inscription on the grip near the blade end. (i'm not terribly fond of the large grip, it is not comfortable - the original poster's one looks much more practical.) it has an 8.25in. blade...