I'm a bladesmith from lower Michigan and found it interesting that Marbles, to the best of my knowledge, was the only production knife maker to use a convex grind on their blades. With a convex grind when cutting only one part of the side of the knife is touching, making it easier to cut thick materials. It slides through easier. Some custom knife makers will do a convex grind rather than a flat or hollow grind, but it takes longer to do. If the convex grind is done all the way to the cutting edge you can't see it. One doesn't think it's sharp, but look out, it's finger cutting sharp. Years back when I took a forging and then a Damascus making class at the American Bladesmith Society the instructer Dr. Batson, ask for anyone to show a knife they had made. So their I was, proud as a peacock, showing off a 10" Bowie I had hollow ground. He said this is a really nice knife, only one thing wrong with it. What ? It's hollow ground. Bladesmiths don't hollow grind but flat or usually convex grind. Lesson learned. I came back home and bought a Marbles just to study it. It's a shame bean counters bought the company. Many of the grinding hands bought some of the equipment and opened up another company. I believe it was Indian River up in the northern part of the lower peninsula of Michigan. They were as good as knifes come.
