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Three Port Circulator, by Marconi Company, England, 20th Century
Inventory Number: 79157
Date: 20th Century
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "3 PORT CIRCULATOR / FREQUENCY 600Mc/s / TYPE F1031-02 / SERIAL NO.114 / MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / MADE IN ENGLAND / TRANSMISSION / DIRECTION" printed on metal plaque upon upper surface.
Size: 100mm (in diameter) x 60mm (in overall height)
Materials: Steel, metal.
Notes:
Three Port Circulator in cylindrical steel case with three screw-type ports on exterior of cylinder. Cylinder is of heavy density, and is possibly solid.
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