25903
100-400 USD
$100-$300, depending on who made it, and the condition.
100-300 USD
25-200 USD or so
Made in Germany or Italy
Navy Arms was an importer. It was most likely made it Italy
It was made in 1974.
1867
Navy Day in Italy is on December 4.
With a letter in the serial number, I doubt if it is a genuine Colt. Probably manufactured in Italy sometime in the 1960s or 1970s.
Colt 1851 Navy sn 179639 was made in 1864 (175000-179999)
depending on condition $150 - $250