Hells Heels (1930) (1930). A villainous Oswald the Rabbit tries to open the bank safe. But when he turns the dial it becomes a radio. "When the gong rings," says the announcer, "it will be exactly one minute past."
Thugs with Dirty Mugs (1939) (1939). The thugs break into a mansion and try to crack open a safe. But after they turn the dial, they're perfectly happy to lie in front of it and listen when it plays "The Lone Stranger."