There’s a mould hanging on the wall for baking ring cakes. If you’re American you’ll call this a Bundt pan, but they were uncommon in the USA of the 1930s. In Germany and Austria Kranzform (wreath-shape) pans for baking Bundkuchen aka Gugelhupfer have been known for 300 years: ceramic, copper, or iron before the days of enamelled steel or aluminium.