Yes the short side has the odd Marine pattern, however instead of the short strap being stitched I had Les rivet it. The keepers are sown without staples, your correct the leather is as thick as is NRA/CMP legal. I liked your description of the Caterpillar track and its fitting.
I spoke with Richard a few times over the phone, we both had the same opinion that way way back in the stone age the Corps still had Horse/Mule teams and it was easier too repair, restrap, recycle frogs and "D" rings as was needed from leather bridals instead of buying new. Remember this was in the days when the pre-war Marine Corp was still smaller than the NYC Police Dept and they had almost nothing for a budget.
My Grand Father was what many called a old hand he enlisted in 37 after a two year wait, retired in 67. China, So Pacific, China, Okinawa, Korea and while he was Active Duty for VN the powers that be said he had done enough for the Corps your sitting this one out, thus came his retirement. I do have a set of his dog tags and his ser number is a whole whopping 6 digits.