You have an Ithaca Flues model made in 1917 if it is a sxs double not stated in your ques
You can tell how old your Ithaca gun is by the model and serial number
No way to answer. Serial numbers do not work that way.
We can't tell from a serial number alone.
You have a Ithaca Model 49 Saddle Gun which was mfg between 1962-1978.
1905
Impossible to answer without the serial number
You need to provide the serial number.
Look in "The Ithaca Gun Company - From the Beginning"
double 12 ga
No way to tell from SN only.
The serial number indicates your gun was made in 1955.
The serial number indicates your gun was manufactured in 1949.