Nickel finish?
Same gauge Parker Reproduction 3-bbl. sets are extremely rare -- there's likely only a handful in existence. We've discussed them a couple of times before here in the forum. Although this set has a different serial number, it is very similar to the set you're asking about
:
https://parkerguns.org/forums/album.php?albumid=530
Value? Its true worth will be set by the buyer. I would say a most sellers would likely ask somewhere between $7K and $12K.