Telefunken Model Magnetophon 77 Tape Recorder (1959)
This is a four-tube, four-track, stereo recorder. The Magnetophon 77 was produced from 1959 to 1963. It was, although it's very tiny, rather expensive, so it's not so easy to find today, compared to its monophonic brothers M74, M75 and M76. By the way, the M77 was the first full stereo tape recorder by Telefunken.
Telefunken Model Magnetophon 85 - Two Speed Monophonic Tape Recorder (1959-68)
The tape recorder Magnetophon 85, produced by Telefunken is a recording and playback machine especially designed for pretentious recordists. The advantages of the Magnetophon 85 regarding sound quality are: a high signal to noise ratio,an extremely low rate of flutter and wow, and a remarkable frequency range on both tape speeds.
Track system: 2-track, single channel, monaural system Tape speeds: 3 3⁄4, 7 1⁄2 ips Valve complement: EF86, ECC83, ECC81, EM71a