Does not fall in published sn range. You must call Colt
aboutm 1913.....................
If it is a Colt 1908 hammerless .25 with that serial number, it was made in 1912.
You did not state the model, but there was an Automatic-5 with that number made in 1953.
The Colt model 1908 hammerless .25 with that serial number was manufactured in 1919,
If it is an Automatic - 5, it was made in 1925
You will need to provide the number and letter that proceeds the serial number to your shotgun to have the date of manufacture answered.
Junior Colt .25 with that serial number was made in 1973.
1/24/1965Based on the records I have, a junior Colt .25 with the OD prefix serial number started in 1971.
100-1000 or more depending on specifics
No way to answer without a detailed description of all markings, caliber/gauge, etc..
A Colt Python serial number 35128e was manufactured about 1964
when was the savage model 99 serial number 655391 manufactured