Clock used by the East German broadcaster Deutscher Fernsehfunk in 1968.
<a href="//commons.wikimedia.org/wiki/User:Fer1997" title="User:Fer1997">Fer1997</a>
<span class="int-own-work" lang="en">Own work</span> with <a href="//commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_183-G0301-0001-009,_Leipzig,_Messe,_RFT-Sortiment,_Fernseher.jpg" title="File:Bundesarchiv Bild 183-G0301-0001-009, Leipzig, Messe, RFT-Sortiment, Fernseher.jpg">this image</a> as reference