"Ithaca Featherlight Repeaters" by Walter Claude Snyder
1947
The serial number indicates Ithaca manufactured your Model 37 in 1956.
1951
1950
Date of Mfg. is 1947
1949
Watch Gunbroker.com - they often have barrels listed. Also you might try Ithaca Gun USA, a company that has picked up the rights to manufacture the Model 37.
The Model is "37," with the grade identified by a name (such as "Featherlight" or "Deerslayer") or a letter. Otherwise, it is a Field Grade, either Standard (2 3/4" chamber) or Magnum (3" chamber). I am aware of no public listing of Model 37 manufacture dates, but IDSA Books publishes Ithaca Featherlight Repeaters. They're on the net. However, your serial number denotes a fairly recent manufacture). 1973
depends on the year and manufacture date of your gun . also do all the parts match by serial Number you should find the serial Number on side of the receiver (on newer Ithaca) older style Ithaca the serial Number will be on the Recevier (Between the magazine tube and barrel) then look up WWW.SURPLUSRIFLEFORUM.COM on their site look up on their Search engine type in "ITHACA 37 DOM" there you'll find the serial list number
you might be able to get a answer at arms collectors.com
I am aware of no public listing of Model 37 manufacture dates, but IDSA Books publishes Ithaca Featherlight Repeaters. They're on the net. My info says 1957, but I have no clue what the -2 suffix means. The -2 suffix indicates barrel belonging to shotgun 704515
your Ithaca model 37 is made in 1966 look on WWW.SURPLUSRIFLEFORUM.COM look for in the "search engine" on that web site type in ITHACA 37 DOM there you'll find the Serial Number chart