1950
1949
you might be able to get a answer at arms collectors.com
The serial number indicates Ithaca manufactured your Model 37 in 1956.
what is the value of 12 gauge skb double barrel ithaca 1900 model
There's a list of serial numbers by year at http://ithacagunrepair.com/page5/page23/
You have an Ithaca Flues model made in 1915
shotgun
.12 and .20 Gauge, and they also came in Magnum models. The .20 Gauge models are the rarer of the two, and the Model 100 was actually manufactured in Japan by SKB and marketed by Ithaca.
1951
You have an Ithaca Miner model made in 1907
It is an Ithaca model NID made in 1926
You have an Ithaca sxs Flues model made in 1919.