The records I have show it was produced in 1863.
The highest for Colt 1851 navy original was only 215348 in 1873. Yours must be a reproduction model?
1862
Colt data at Proofhouse.com
The 1851 Colt revolver, also known as the Colt Navy Revolver, did have serial numbers, although the practice of serial numbering was not as systematic as it is today. Colt began marking their firearms with serial numbers around 1850, and many 1851 models feature them, but not all. The absence of a serial number does not necessarily indicate a counterfeit or replica, as early production methods varied. Collectors often use the presence and format of serial numbers to help date and authenticate these revolvers.
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
Go to proofhouse.com to look up date. There are more that one type of SA Navy Colts.
made by Colt for US Navy. not unusual to see a springfield slide on a Colt frame
value always depends on overall condition. with a serial number the date and maker can be established.................
It was incorporated on January 1st, 1851.
You will have to call Colt
Army Colt .44 around 1863. Navy Colt around 1861if it's a civil war cap and ball made about 1863 if it's a cartridge model, single action, made about 1885
1851