{"product_id":"vintage-pair-of-gambrell-basketweave-coils-efficiency-inductance-d","title":"Vintage Pair Of Gambrell \/ Basketweave Coils Efficiency Inductance D","description":"\u003ch1\u003eVintage Pair Of Gambrell \/ Basketweave Coils Efficiency Inductance D\u003c\/h1\u003e\n\u003cp\u003eA 1920s Vintage Pair Of Gambrell \/ Basketweave Coils Efficiency Inductance D In Their Original Box. Made by Gambrell Bros. Ltd., 76 Victoria Street, London, SW1.\u003c\/p\u003e\n\u003cp\u003eIn very good cosmetic condition, they appear to have never been used. The larger coil is wrapped in wax paper with a paper label marked B9 and the plug \/socket stamped LISSEN, patent pending. The other smaller coil, with visible windings, has no discernible markings.\u003c\/p\u003e\n\u003cp\u003eThe red cardboard box is marked:-\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eGambrell Coils \u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eEfficiency Inductance D\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePatent No. 197140 \u003c\/em\u003e(which dates to 1923)\u003c\/p\u003e\n\u003cp\u003eThere is a table printed on the rear giving a list of Gambrell coil sizes and their nearest size in ordinary coils, and outputs for anode and aerial circuits in series and\/or parallel.\u003c\/p\u003e\n\u003cp\u003eAn interesting early radio \/ audio collectible which would look great as a desk ornament!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" target=\"_blank\"\u003evintage technology. \u003c\/a\u003e\u003c\/p\u003e","brand":"Gambrell Brothers Limited","offers":[{"title":"Default Title","offer_id":57071115174263,"sku":null,"price":24.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Vintage_Pair_Of_Gambrell_Basketweave_Coils_Efficiency_Inductance_D.jpg?v=1778159945","url":"https:\/\/mullardantiques.co.uk\/products\/vintage-pair-of-gambrell-basketweave-coils-efficiency-inductance-d","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}