Hard to tell because of the focus (I have that problem too), but the shelf-like appearance and absence of notching would lead me to believe machine doubling.
O M G You know your stuff!! Was it that amazing tone they have? Is it true '72 (P) does not have a DDR? This really looked promising
It was a complete guess haha. I am surprised I was correct. I also don't know much about doubling. I would trust what Kentucky said.
