The Ithaca model 66 single shot shotgun that was made from 1963-1978 was offered in 12ga,20ga and 410 gauge only.
Made in 1968
Made in 1949
Made in 1915 - probably a Flues model.
You have an Ithaca NID model made in 1926, Not knowing condition or grade 300 -3500.
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.
You have an Ithaca Flues model made in 1915
If this is an old side by side it would be a Baker model made in 1886. Serial numbers of Ithaca shotguns for that year were 2448 - 4101.
Its an Ithaca Flues model made in 1921
The gauge is stamped on the water table by the serial number. It is a Flues model made in 1924.
Its an Ithaca Flues model made in 1921
I would say that you have a Ithaca model flues double barrel shotgun that was made in the year 1923,with the serial number that you provided.
1938-39