Depends on it's serial number.
Your colt python was made in 1961.
@35 years old
That Colt python was made in 1969.
36 years old
That Colt python was produced in 1981.
Do you have a colt python?
A Colt python with that serial number would be 43 years old, made in 1969.
Your colt python was made in 1975.
That Colt python was made in 1975.
The Colt python with that serial number was produced in 1961 making it 48 years old or the Colt trooper in 1958 making it 51 years old.
About 36 years old, made in 1975.
A Colt Python serial number 35128e was manufactured about 1964