On a radio buttons are for long-wave (LW), medium wave (MW), short-wave (CW) and ultrashort wave (FM) to see eye see, photographed on 26 December 2015 in Kassel (Hesse Stock Photo -
EveryMarket
EveryMarket
UKW/MW Radio-Wecker Precision Radio Intercombina GmbH; | Radiomuseum