Great looking knife and sheath, Will. Not sure if the keeper strap was made by Bohlin, but it is a common "fold-over" design that is often seen in vintage gun belts. Heiser made that style of belt as well. It would make sense that a holster shop might have made it and just copied the basic design of a gun belt. Regardless, I think the keeper strap is pretty cool.

Here are a couple of photos I took from the book, "Packing Iron" of a vintage Heiser rig.