Case spits out “commemorative” knives like jelly beans. That one was apparently some type of “limited edition”, the number 363 on the bolster means it was number 363 of xxx. Could have been 500 or 1000 or who knows how many were made. You didn’t say what the pattern number is (it should be stamped on one of the blades) but it looks like a trapper which is one of the most popular, and most common patterns. You may know that already.
As for value, do an advanced search on eBay for sold listings of “Case trapper commemorative” or similar. Doubtful that you’ll find that exact knife but that should get you in the ballpark of what commemorative trappers are selling for. I’m guessing about $60 to $80, unless you can find a buyer looking for that specific commemorative. If so you might get $100 or more.