M-193 (Vol'tmilliampermetr) 1952
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Voltmilliammeter "M-193" from 1952 produced the Leningrad plant "Vibrator". The '' M-193 '' type voltmiliameter is a portable laboratory multi-range device of a magnetoelectric system with a shadow arrow and direct reading, designed to measure DC current and voltage. The device, possessing high sensitivity and low power consumption, finds its use in measurements in low-power circuits in laboratories, or shop practice.
Documentation:
Information from collection of Valery Khartchenko