Your serial number indicates that your Ithaca shotgun was made in the year 1920.
your 1911 was made by Ithaca in 1943
Call Ithaca at 1 877 648 4222 and they will tell you.
The Ithaca saddle gun was made from 1973-1978.It was made by Erma werke,in West germany for Ithaca.
401438T
1976
The same year you shot your gradma you freak
1976 is the year
You vave an Ithaca sxs Flues model made in 1911
In the myths our chronology does not apply.
1975
Impossible to answer without the serial number