S1-31 (Oscillograf universal'nyj) 1964
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The universal wideband oscilloscope "S1-31" was produced since 1964. Designed to study the form of electrical processes in a visual way or photographing them. The oscilloscope is mainly used in the laboratory. The instruction manual for the oscilloscope "C1-31".
Documentation:
Information from collection of Valery Khartchenko