18th Oct, 2019 12:00
Fine Photographica & Instruments of Science & Medicine
A Large Radiation cooled Triode
English c. 1920, with markings for Ediswan, Made in England ES 833 no. 1903, on metal stand.
English c. 1920, with markings for Ediswan, Made in England ES 833 no. 1903, on metal stand.
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Auction: Fine Photographica & Instruments of Science & Medicine, 18th Oct, 2019
