The Model 37 was mfg in 1969.
Call Ithaca at 1 877 648 4222 and they will tell you.
By the serial #
1957
1970
You would need to include the model number or name of your Ithaca firearm,along with the serial number to get the correct answer.
Made in 1977
Mfg 1975
1974
1989
The serial number indicates your Model 37 was manufactured in late 1969.
around 1950
1969