Answer:
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