Here's what I can add.......up until the turn of the last century, before Webster Marble introduced the Ideal pattern, typically outdoors-men/hunters carried variations of the Russell Green River knives, often called trade knives,
typically in the "butcher" and "river" patterns. They were forged from "soft" carbon steel and generally were not very thick. About 1900, Webster Marble literally "invented" a new breed of hunting knife........the Ideal. Almost immediately the American outdoors-man embraced this new design..... so much so that it became wildly popular and copied by other knife-makers. The Ideal was much thicker than those used until then, and was harder, forged from 1095 carbon steel; also the Ideal was deeply AND widely fullered. In fact if you look closely at the Ideal pattern you will see that the the fuller is extraordinarily WIDE so as to no only lighten the overall weight of the knife, but to facilitate easy cutting. In an above post Thomas Linton states insightfully :
It was supposed to allow easier cutting of thick material (Think flesh.) because there would be less steel in contact with the material.
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The key is in the width and "arrangement", if you will, of the "groove"..... and this added a new dimension of versatility to the hunting knife.
I know others will come along soon and add much more insight into this discussion. I do not have nearly the knowledge that many of you do who contribute regularly to this forum. I am learning new things from all of you all the time.
However, if you have never tried a Mike Stewart era Marble's Ideal made from 52-100 ball-bearing steel with a convex edge, I assure you the knife cuts like a laser. I believe the current crop of Marble Outdoors Ideals are made from 0170-6 (not bad steel in my opinion), and I frankly am not certain if the edge is convex ground.
All that being said....my favorite Marble's pattern is the "Woodcraft". I think these knives will do just about anything any "outdoors" knife can do...and they excel at their primary task...cutting. Here is one of mine made from 52-100 with a convex edge. The thickest part of the spine is nearly 1/4", but the convex edge is "wicked" sharp; it might be difficult to believe how sharp these knives are if you have never used one. However, if you own or have used a Bark River then you know !