A few hundred to tens of thousands of USD depending on EXACTLY what you have.
50-200 usd
made 1904.....................
it ain't worth a monkeys left ball
1964-65
1874 or 1875. IMHO, worth spending the money to get a letter from Colt on it.
475
Don't know value, but produced in 1966.
The gun is 49 y.o. Cant tell what its worth without seeing it.
Ruger's website has extensive sn data available for all. 150 USD or so
i saw a model 66 single shot lever action on guns America for 285.00
based on serial number of an original colt SAA, 172596 was made about 1898........
Impossible to value with just the serial number.