The <i>Alibiphon</i> magnetic-disc-based answering machine. All tubes, first released in 1957, developed by Willy Müller (Phonova AG, Switzerland), produced by Friedrich Merk Telefonbau, Munich. This is the top part, containing disk recorder/player for the brief outgoing message. The missing bottom part contained control for an external reel-to-reel incoming message recorder (a third unit to make just one machine, right).
<a href="//commons.wikimedia.org/wiki/User:Cherubino" title="User:Cherubino">Cherubino</a>
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<span class="int-own-work" lang="en">Own work</span>