Flygas
That is a dandy RM you have there, with great provenance.
I'm not an N frame collector (have a few) so I'll probably never own a Registered Magnum. Besides, for what I'd have to pay for one in collectible condition, I could buy two or three revolvers that fit my collection! But I do admire them and am always delighted to see a special one. Several of those are represented in this thread!
But I do have a humorous aside for you, related to the title you gave to this thread.
ALL RMs are
unique, since they were all special order guns.