Tom
Shandigan barongs, the edge is more like someone re-inforced by adding steel to the cutting edge on a regular barong, vs hollow grinding it out. The normal part starts as a regular flat grind, but then about half an inch from the edge it poofs out into a new thick edge which is convex. Really no hollow grinding done at all, and by my eye it would be forged in, trying to flat grind all the material with hand tools would just be way to time consuming and a waste of steel. Particularly where the reinforced edge meets the normal flat on mine, it is somewhat rounded (not a good word but all I can think of right now), not consistent with a grinding.
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