It is a little now, with the flat board being the basic unit of wood (though you have to remove the same amount of wood to form the cavity for the blade, either way), but for a traditional carver proceeding from maybe even picking and felling a tree, much less-so; it's not a lot harder to initially make the scooped out shape than a flat one; really superflat is actually one of the harder things to do with just knives and chisels. So, how does the timeline go on these? Is it the older way left over from ancestral chisel bevelled blades in some areas where it gets paired to centrally bevelled ones? Or is it newer, growing out of sawmills and flat boards? Don't ask me; I dunno. The scramasax is decently old, as is my mystery slasher (you know how I am about chopping
), and these two Leyte talibons (there's two, but only one has a rectangular handle section; the other is flattened oval) seem old, too; if the 09 is a date that'll simplify matters with them......On a chisel bevel blade the one sided sheath just seems sensible; it fits better, and I remember earlier in my studies marvelling at how a centrally made sheath on a chisel bevelled Visayan sword prevents it from being able to cut out of its sheath, unlike with a kampilan (or panabas?). And then theres the central-bevelled blades in onesided sheaths......hmmmmm.....hmmmmmm!