Doesn't that one also present a problem for the popular knitting theory? Aren't the holes supposed to show the finger size or something? (I'm not positive, as a knitter this seems really unusual for knitting).

Ya know my dumbass mixed up coin sorter and coin holder. But that does present another idea, do you think you could slot a coin in between the little nubs? Basically an antiquaties version of those belt coin holders?

Not really, look up nalbinding. That old way of knitting used one thumb and a needle instead of two needles. all those knobs could have been used in place of your left thumb.