Congrats on the great find! I found mine just be keeping all pre 1960 coins for some time then once I learned about the key dates I went back through and looked at the keepers and there she was. Keep up with the good work!
The first panacea for a mismanaged nation is inflation of the currency; second is war. Both bring a temporary (and false) prosperity; both bring a permanent ruin. But both are the refuge of political and economic opportunities.
This post inspired me to sort through all of my pre 1960 nickels that I put on the side. Sadly I am still missing the 50, 50D, 38D, 38S, and 39 D. :(. Maybe next time I will get some luck! Continued success.