Yes, Middleton Place near Charleston. I am blessed to have great friends in the Hill family, and they got my wife and me into living history. They regularly set up on Living History weekend there, and invited me to join them. It was great fun, and I got to talk leather working with a lot of people. Talking hunting pouches of course allowed me to talk muzzleloaders too.
Just this weekend I was describing to folks how a belt bag could be used. One use being a nice day out squirrel hunting. This bag would hold a flint, a screwdriver, a handful of balls, and a piece of patching cloth. With a rifle in hand and a powder horn, you have what you need. Except a Snickers bar. It'd get pretty flat.
I made two bags to sew at the event, and ended up running out of stitches to sew in demonstration. This little bag was one of these. The Hills demonstrated rifle making, lye soap, butter, and powder horn making, as well as pewter casting. I've probably left out something.
My dad made leather products with that sort of wide loop. It rides very stable. The slot in the middle is so it can flex a bit if needed. If one were to wear pants with a belt loop, a wider slot would allow the belt loop to straddle a loop.
Mike, my sincere thanks for the very kind words sir.
God Bless, and best wishes, Marc