I would guess a miniature reel to reel. Your mission, should you choose to accept it is to prevent the tape self destructing in ten seconds
alsmost right, just a bit too big for a „mission impossible: ...it‘s a1963 Nagra III, from her first owner, a long retired journalist. as in those days Kudelski was didtributed in germany by the (for their reel-to-reel machinest at highest professional studio-standard known) german company Telefunken, that‘s whay it‘s labelled Telefunken in the front and buttons have german discription. haven‘t tested it yet as it came without an external powersupply, will have to run today to buy millions of mono-blocks 1.5v (i think it takes minimum 12 ?) full track mono, off course...