1843 44 caliber Navy revolver engraved by WL Ormsby New York serial number a14510 serial in its original box how much is it worth?

The Navy revolver was not .44 caliber (it was.36 caliber), and was not made in 1843. Without seeing the gun, will tell you it is likely you have a reproduction of the Colt revolver made in Italy by Pietta. You will need a hands on appraisal by an experienced dealer or collector. Modern day reproductions are in the $200 range, depending on condition. PS- Ormsby invented the machine that performed roll engraving. While he was an engraver, his actual engraving was for printing plates for bank notes. Not guns. We have been asked about a revolver with THAT serial number at least 5 times, reinforcing the belief that it is a reproduction.