{"product_id":"pair-of-1920s-herzite-cymosite-radio-detector-crystal-tins-with-crystals","title":"Pair of 1920s Herzite\/Cymosite Radio Detector Crystal Tins With Crystals","description":"\u003ch1\u003ePair of 1920s Herzite\/ Cymosite Radio Detector Crystal Tins\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThis is a Pair of 1920s Herzite\/Cymosite Radio Detector Crystal Tins With Crystals. The tins, used for storing the radio crystal detectors, are the same as used for storing gramophone needles and are often referred to as 'needle tins'.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn pretty good condition, with a few scuffs and scratches commensurate with age and storage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTwo tins are included in the listing:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1.0 An orange tin \u003cem\u003eCymex\u003c\/em\u003e Branded \u003cem\u003eHertzite\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2.0 A blue tin branded \u003cem\u003eCymosite\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach tin was made by The North Eastern Instrument Company, Low Fell, Gateshead, England and contains one piece of crystalline lead sulphide, Galena. This mineral was used in early 20th century radio receivers, for example, the cat whisker detector, acting as the first type of semiconductor diode in conjunction with a fine wire (see image).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more\u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/radio-equipment-accessories\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e early radio equipment and accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"The North Eastern Instrument Company","offers":[{"title":"Default Title","offer_id":35333844140181,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC08286.jpg?v=1595943911","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/pair-of-1920s-herzite-cymosite-radio-detector-crystal-tins-with-crystals","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}