I had a similar belt, a hundred years ago when I was in college. Two identical ends, no buckle holes, just nicely rounded off and finished. The "buckle" was a wooden circle, probably a drapery ring, stained to just lighter color than the leather. A keeper on each side of the buckle. Looking down at your waist, you would see each end of the belt come to the outside of the wooden ring and loop back through it to the inside, threading through the keeper.

Hope that makes sense! If not I could probably draw a "top view" given some time. Really nice simple design, the only hardware was rivets in the keepers (hidden inside). You could do the same thing with a rectangle of metal, maybe find something with a Celtic knot in the middle and room enough for the belt on either side. . . hmmm, Tyger Forge? You listening?