Made in 1901
Your serial number indicates that you have a Ithaca crass model double,that was made in 1903.
The gauge is stamped on the water table by the serial number. It is a Flues model made in 1924.
built in 1908, 104 yrs old
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
1906
Go to diamondgunsmithing on the internet and enter your serial number. That will do it.
It sounds to me like you have a Early made Ithaca Baker model double barrel shotgun made in 1889-1890.As to value I would have someone with the knowledge to evaluate you gun and then he could assign a value for you.
Open the action and on the receiver flat will be the serial number and another number denoting the grade. Need all of that information, as well as some digital pictures to determine condition. sales@countrygunsmith.net
If the shotgun is a hammerless double, it is a Baker Model produced in 1899 (per Dixie Gun Works, Ithaca Serialization Guide) That serial should be a 1926 production NID. sales@countrygunsmith.net
it 's probably a baker model built around 1888. pbl
It sounds to me that you have a Ithaca Flues model double barrel shotgun.With the serial number that you provided,your shotgun was made by Ithaca in 1917.
The guage and grade of an Ithaca Hammerless can generally be found on the left front corner of the water table on the frame. The serial number is usually on the right side of the same water table, on the barrel flats, and on the forend iron. To determine which design you have, check http://www.shotgunworld.com/identify.html