Two electronic valves (voltage regulators), Type 0B2, manufactured by CEI, Germany in original packaging. Used as spare parts for the MUDPAC analogue computer. These valves most probably would have been used for voltage reference in a power supply.

Physical Description

Tubular glass bulb with exhaust tip on top with seven pin miniature base. Cardboard box with gold and red glossy background; red and white printed text.

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