Triple X-Stopper, by Marconi Company, London, Early 20th Century

Subject: Radio communication; Radio communication
Item type: Object
Makers: Marconi's Wireless Telegraph Company Ltd.
Provenance: Presented by the Marconi Corporation.
Primary inscriptions: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD / NO. 103 LONDON" on brass plaque upon front exterior surface of case.
Physical material: Ebonite; brass; mahogany; metal alloy.
Object type: Radio communication
Dimensions: Height: 140mm Width: 222mm Depth: 145mm
Inventory No: 87224
Accession Number: 2004-9/10

Description

Triple X-Stopper, with three sliding contact acceptor circuits arranged in series on ebonite panel in mahogany case.