Tom – I have Bear documentation from 1941 through 1954 that proves different models of the original Tube Style Northwoods were available for those years. The 12 original Northwoods that appear in the upper right hand corner of this photograph include many of the quivers that are actually pictured in the Bear Documentation from 1941-1954. For some time, I have been documenting Bear Leather Hunting Quivers 1933-1971, but I do not have a completion date for this work.
I also have one model that is very easily recognized as being noticeably different, it is not shown in this photograph, that example is the rarest of all Northwoods.
Not sure what you mean by “variation”. If you are looking for documentation for every leather variation of the Northwoods, this photograph would be far from having every example of those variations.
The later Open Back Northwoods shown in the lower right corner has the Northwoods, name but is a much later quiver and much different design. I just sent an extra of this later Northwoods to Trap.