My Father in Law recently passed away and he had this among some other black powder pistols.

It is a Colt made and marked .36 1851 Navy. It is new and unfired 100% condition. From what I can find it is the "C" series, Royal Blue finish with silver plated brass backstrap. Has the scrolled cylinder engraving marked: "WL Ormsby, New York engaged 16 May 1843" Comes in a walnut presentation case, with a brass 2 cavity mold ( made in Italy) and a combo screw driver/wedge pin tool. There is a place in the case for a powder flask but none is present. Also the key for the box. Not sure if the presentation case is correct for the revolver as I cannot find where they were shipped with these. No Colt markings on the case. Serial number is in the low range of production 645 after listed first one putting it in 1971. I would appreciate any additional information and a possible asking price. Father in law was a WW2 vet and his widow isn't well off.
Regards and thanks,
Bruce in Hanover.

Blue Book of Gun Values --

Because the case is Italian, I'd first wonder if the gun is not a Colt replica from Italy. I have a Colt Wells Fargo, fully detailed w/ all the Colt markings, but it's an Italian replica.

Your father-in-law's wife needs to contact the Vets Admin. She's eligible for some specific benefits, burial, possibly life-insurance, perhaps a pension. Contact the VA, online or they have an 800 access number.

Henry Arms owner took a contract with Colt to produce the new Colt cap guns. The story was that they were made in the US, specifically the facility he had in Brooklyn.

Yes, the Imperatos made these from Italian parts, but they were all marked with full Colt markings on license from Colt's. OP says his revolver is Colt made and marked. One on GB for $555 with 10 bids and one for $725 with no bids. So it's worth somewhere in that range, maybe more or maybe less. Put it on AR classifieds and see where it goes; won't cost you anything.