No clue, you have everything that I have related to them. Looks like that paperwork came in the Buffalo box, which is also appears to be a picture of the buffalo box. Makes me wonder how many of these are out there.

One interesting thing about the two boxes is that the Buffalo one appears to be made of the same piece of wood, but doesn't have the really neat arrowhead hinges. The Cowboy box however may be two different pieces of wood. The Cowboy box doesn't close as nicely as the Buffalo box does, looks like over the years the wood has warped a touch.

Both of them fit a 6" Pre-War K-Frame. I think from some of the scuffing that they maybe had Target models in them. I tried putting a post war, early pre-model 10 into them, but it doesn't quite fit.