chasindreams

I couldn't find my new post from yesterday, so I re-summitted it, if I'm doing something wrong here, please,(someone) let me know, ok? not sure, if I'm in the right dept/here, so please message me, so I can do this the right-way! here it is again!
I recently purchased a 1953-D Jefferson RPM-1/Slabbed by Anacs. I would like to know what the Population of this (Rare-Variety) is.
The question, I'm tryin' to ask is,If it's Label'd RPM-1 on the Slab >> does this mean,it's a Inverted-D ?
I do know that it's not recognized by the Red-Book, I read that only a handful of collector's out there,have this Rare Jefferson-Variety, this is a ( Anacs/MS-64/D/D/RPM-1 ) I would Love to hear from a Jefferson Variety-Collector, who would know about this coin,I would sure appreciate that! Respectively' Jim/Chasindreams