It doesn't look like an RPM tome, but it's very difficult to tell without a microscopic image. You simply cannot get close enough to the mintmark using macrophotography.
Do remember that many of the 1952D dies were punched with a faulty mintmark punch that had part of the lower serif broken off. It looks like a split serif RPM but isn't.
Do remember that many of the 1952D dies were punched with a faulty mintmark punch that had part of the lower serif broken off. It looks like a split serif RPM but isn't.



















