its hard to tell from the pic but i think its one piece of leather. It may have been formed in a press but that result can easily be achieved by hand and then just going around the inside with a creasing tool.
If its two pieces of leather and i was going to make this then I might join the two pieces together (rough to rough) and then cut the shape i wanted
Hello, i have used Chicago screws on a leash i made to form the handle and the closure for a big strong dog and had no issues what so ever. in fact i choose to use screws instead of the rivets i had at the time