I removed the two rivets from the overlapped buckle strap and saw that the original pieces were all there so I sistered them together with a thin leather reinforcing piece underneath. The strap still looks pretty beat up but I thought I had to try to save it.
I replaced the canvas reinforcement inside and re-stitched the pattern of three rows of holes around the pocket by hand. it took a number of days. I had been buying odd pieces of antique leather from flea markets and had one to use for the buckle web strap. I needed a piece about 10" long. I carved out a section at the end of the new strap to lay in the 1" remnant that was still on the mitt. In woodworking terms it is called a rabbet joint. It came out pretty flush and I was happy with the color match.
I had some thin flat lacing that I used at the heel and really like the look of it with the tiny grommets.
The full adult size Reach 5A mitt on the right is for size comparison. The buckle web mitt is 12" high by 11" wide. I was happy how the new pocket stitching and canvas underneath really helped define the pocket better. This was a patent feature by Elroy Rogers at the turn of the century for Victor Sporting Goods as was the buckle web design. I wondered why the buckle web was so elaborate and thought maybe the D-rings were somehow meant to distribute the tension, kind of like a pulley system. The padding went back in pretty easily and the mitt feels great on the hand, which for me is what it is all about