Zenith’s “robot dial”, which received a make-over from its inaugural 1938 model year. One of the most powerful and rare Zenith tabletop radios, a 12-S-445 Shutterdial embodied two innovations new for 1940. With this 12 tube chassis configuration you can hear sounds only previously available in a large floor consol radio. https://artdecocollection.com/clocks-and-music/radios/vintage1940-zenith-12-s-445-shutterdial-restored-radio-bluetooth/
