Czech secret police recorder, built 1960. Very advanced design, modular, compact, easy to service, tube half-track, three-head recorder. Separate recording and playback path allows online ("post-tape") recording check. AC 115/220 operation only. All functions controlled by electric actuators, thus, no complicated mechanical gear. Now ready for restoration, no futrher info (model ID etc.) known. No documentation, no witness information.
Any information appreciated.