Your 'Navy' is actually an 1860 model Army revolver.
ASM did make copies of the 2nd Gen Colts, and applied to Colt's Manufacturing for a license to manufacture and sell. Unfortunately, they anticipated approval and jumped the gun (pun intended) a bit, producing and selling several before Colt's Manufacturing came back with a no. Colt's issued a cease and desist and ASM complied, but not before several dozen (hundred?) were out in the public's hands. You apparently have two of those 'escapes'.
You're very lucky to have them. They are not worth as much as a genuine 2nd Gen Colt, but they are rare and collectible; I'd love to have some. They are a market rarity; the used gun price books don't recognize them, so prices are really set by the buyer/seller marketplace.