Cool! If you're interested in selling - let me know. I have no idea what-so-ever about what it's worth. I just happen to have some '39 shipped guns and would find it a good match.
In Pristine condition they sell for $75.00 to $100.00.
In this condition, because of the fold, $40.00.
I have had quite a few of these, some with the original envelope. I have three right now, all with different pages inside.