Great thread!
I have some of my Dad's meat cutting tools, some that I saw him use and still use myself. But I have one old butcher knife that I know was his but never saw him use. I asked my older brother about it and he does not recall ever seeing Dad use it either. But I do know that Dad worked in an abattoir to supplement farm income before I was born and some in my younger years. We also killed hogs every year and I saw the cleaver and his meat saw being used but never the big knife.
The large knife is shaped very similar to the one in the OP on this thread. The blade is 11 3/4" long and 1 1/2" from top to bottom. There are no markings on the blade or the handle. The tang of the blade extends 3 3/4" into the 5 3/8" long handle that is a solid piece of wood slotted for the blade rather than separate scales. It is held together by 2 aluminum rivets. Definitely carbon steel blade with some rust but not bad.
The blade on the cleaver is 8" long and the height goes from 3 3/4" at the handle to 5 1/4" near the end. The round handle is 6 1/2" long and 1 14" to 1 3/8" in diameter. But, like the knife, there is no identifying marks on it anywhere. I have seen it used to break down a many a pork rib cage and I still use it on occasion myself.
I also have Dad's meat saw that looks identical to the one shown in MnMan's post. No marking on it either but I have managed adapt blades to it and still use it today.
To date this stuff, I was born in 1945, the year after Dad had purchased a new farm and he had helped run an abattoir before he moved to the new place and he worked in a meat packing place part time after he moved. I only remember him as a full time farmer so he did not work at the plant many years after I was born. I know he used the cleaver and saw and I suspect he used the knife but never saw it in use. He definitely was not one buy stuff like that without having a use for it.
Any input on the manufacturer of any of this is appreciated.