probably some time after it was made. the military model was not nickel plated.
Not factory. 10-100 USD
assuming it was nickel plated after market, it would lose value for that reason.....
Do you have a colt python?
based on serial number of an original colt SAA, 172596 was made about 1898........
10-500 USD or so
50-1000 usd
about 1926.................
the colt trooper is currently going for 165-350 dollars.You could add 15% because yours is nickel plated(not chrome).
about 1947
100-10000 USD with the description provided.
50-5000 usd
what is the value of a 8 3/8 inch nickel plated colt trooper