Flipperless Chubbie (Stoner, 1938) Stuck in Tilt mode

[billycatfish]

Just picked up a Stoner Chubbie for $100 (delivery included). My first pin! Unfortunately it seems stuck in tilt mode. Previous owner told me it had been working fine. There's a lot more I'll be doing to rehab the machine, but my first step is unlocking the tilt mode. Any advice?

By the way, I'm new here and working on my first two pin rehabs... this '38 Stoner Chubbie and a '78 Williams Darling. Drop me a line, especially if you wanna talk about these machines!