Ruger announced the Mk II .22 auto in early 1982. In June of that year the the Ruger Collector's Association (hereafter called the RCA) offered the RCA Mark Target with the RCA seal engraved on top of the receiver by Ray Viramontez for $297.50. 801 were produced; a person could have the seal inlaid with 24 karat gold for an additional $75.00, and 166 of the 801 made were so embellished.
They came in a reproduction of the pine "salt cod" box the very first Ruger .22 automatics were shipped in, as well as a cardboard box with the RCA logo instead of the Ruger eagle. The pine box also had a red RCA seal stamped on the corner of the bottom.
In September 1982 the RCA offered elephant ivory grips with an intertwined RCA logo to members for $200.00.
The information above is from Chad Hiddleston's excellent book
Encyclopedia of Ruger Semiautomatic Rimfire Pistols 1949-1992, page 206.
I bought this pistol 3 & 1/2 years ago because I had purchased a used Mk II Standard model a couple of months before after not owning one for decades, and had so much fun I wanted a target model to shoot also. This one was marketed by Collectors Firearms for not much more than the same model and era gun without the RCA connections, and I fully intended to shoot it.
But it's so nice I don't want to mess it up; I especially don't to wear off the gold in the seal, or the RCA grip logo. It's only worth a very small fraction of what a Registered Magnum or 1880's Colt SAA brings, but it just seems too nice to mess up. Guess I'll keep on thinking.
I didn't get the original grips, assuming that this one wasn't shipped directly with the ivory grips. I don't belong to the RCA and don't know how that worked.
It's fun to guess, I bet the pistol came from an estate, and original grips were chucked out with a lot of other ephemera that we gun nuts accumulate. I know I have two closets full of stuff that my son will give the old heave-ho to. I could sell it myself, but I'm sooo lazy.
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Edited from my above post of 09/2021.

Bought another Mk II Target for shooting, so this one can rest quietly, waiting for my son to sell it for ten dollars.