The serial number suggests a 1980 manufacture, but none of my references mention a Mississippi River Gambler / New Orleans commemorative. Even the Winchester Collectors site has nothing. Since it is marked 1 of 40, I would guess that it was custom produced for a special event in New Orleans. It may have been a factory job, or it may have been customized afterwards (I am familiar with a similar production done for the various counties in Pennsylvania). Good luck with your search.
New Orleans stands on the Mississippi river.
It was the use of the Mississippi River and the Port of New Orleans
New Orleans, LA is located at the mouth of the Mississippi river.
Mississippi
lower mississippi
I know for a fact its new orleans. It is also a large city near the mouth of the mississippi.
New Orleans source: http://www.eosnap.com/?tag=mississippi-river
New Orleans
New Orleans is about 90 miles from the mouth of the Mississippi River.
New Orleans
Mississippi
Yes