By your description,it sounds as if you have a Ithaca model Flues double barrel shotgun that with that serial number was produced in the year 1914.
Your serial number indicates that you have a Ithaca crass model double,that was made in 1903.
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.
It sounds as if you have a Ithaca Crass model shotgun,that was produced in the year 1903 by your serial number.
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
double 12 ga
The New Ithaca Double models were first made in 1925, but the starting serial number for them was 425000. If it was a New Ithaca Gun (NIG), then it would have been made in 1890-91.
Need to know model
You have an Ithaca Baker model made in 1886 if it is a sxs double not stated in your ques
You have an Ithaca Flues model made in 1917 if it is a sxs double not stated in your ques
You have an Ithaca Flues model made in 1917 if it is a sxs double not stated in your ques
You have an Ithaca Flues model made in 1917 if it is a sxs double not stated in your ques
You have an Ithaca Miner model made in 1907 if it is a sxs double not stated in your ques