There is a date code on the barrel. On the left near the receiver. It is with the gun pointed away from you. Sometimes they are very close to the bottom or very light. Use a magnifying glass, You can also rub the barrel near the receiver with white chalk and then wipe off the barrel very lightly with a clean rag. The chalk will fill in the letters so that you can see them better.
July of 1949 is the manufacture date. There were 201,000 manufactured between 1936 and 1954. The Blue Book values are:
Add 20% to 30% to the blue Book values for retail prices.
I hope this helps you,
Thank you very much for the answer to my question, now I'll be able to let my sons know when my rifle was built.
You're welcome John, I'm glad I could help you.