This is an instrument that Saves the Wave ... it takes an input signal and somehow records and saves it for display on an analog oscilloscope. Someone donated it to me, and I was able to get it to save a waveform and display it on the scope so I suppose it works, but I haven't been able to find any information about it. It's very fiddly. A user's manual would be nice... even better a service manual with schematic. I'm not sure how it works inside, or just how properly to set it up to capture and preserve a waveform. From the appearance I'm guessing it is probably 1970's or 1980's vintage. I'm curious about the manufacturer also.
Has a front panel BNC input jack, a toggle switch to select AC, DC or "off" input coupling, a "Voltage" rotary switch knob that goes from 0.05 to 10 volts in steps, a Trigger Level pot, a "Time per Point" rotary switch that goes from 100 ms to 2 us, plus "ext" which I guess is external, toggle switch for "int" or "ext" Trigger, toggle switch for "man" or "auto" ARM, big square pushbuttons for ARM and TRIG, and of course a toggle switch for power. Rear panel has the output BNC, external input, line power input.