Kudos to VSS, aka @messydesy
I have a dozen 1955 D/S Jefferson Nickels that are not OMM #1. I don't know about every TPG, but most don't recognize minor varieties. In this case, NGC recognizes the 1955 D/S OMM #1, but for the plethora of other D/S OMM's, they simply put on the label D/S, without the variety #. Here is where Variety Slabbing Service comes in. I think they're mostly known for identifying VAMs, but do some other varieties. The boards own @messydesk (John) owns VSS. He did a GREAT job identifying my 12 OMM's and I couldn't be more happier with the service I received. And to make things even better, a few months ago Great Collections began recognizing VSS labels.
Here is an example of John's work.