I would oil it well, then store it in a cabinet or gun safe with a Golden Rod humidity control.
If you don't have a safe, it would almost be worth buying one to store that gun, but of course you could use it for other guns.
If you are not a collector and can see your way clear to doing it, you might contact a museum, maybe in New Mexico, and see if they would like to buy it, or you can donate it and take the value off your income tax.
JIm
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