[sweet70beast]

I watched for quite a long time and a 1M 1950 Plate finally turned up on Ebay a few years ago and I registered my 50 with it (I live in Madison Co.). Last year I found a 53 4B Plate in the Netherlands that I'm going to put on my Suburban. 4B because I grew up in Bingham county. I also got a 47 1A Plate for my Panel.
Jefferson and Fremont county DMV's are the same way, they don't have a clue how it works with Year of Manufacture.
I hate to burst your bubble but they won't let you use a 47 plate with a 52 tab. The counties don't really have anything to do with YOM plates, that stuff goes through Boise.