1929 - 30's Lionel 390E

I bought this in 2022 from seller alwayshappy. At the time when I first ran the train, it wouldn't go forward, only in reverse. Well today, I'm storing and organizing my trains. I was taking a look at it to see if I could flip the motor around, and lo and behold, I noticed a lever. Well, I moved the lever and decided to try it again, and guess what happened? It runs forward.