Vintage Analog Device DC Portable Potentiometer PP-63 Russian Soviet USSR 1968. Size: 340 x 230 x 200 mm. Accuracy class: 0,05. Measurement range: 0-25 mV; 0-50 mV; 0-100 mV. Year of manufacture: 1968. Measurement of electromotive force and voltage. Checking pyrometric millivolt meters. Similar device were using in military production and Soviet industry in period […]