{"product_id":"bth-intermediate-lantern-morse-code-signalling-lamp","title":"BTH Intermediate Lantern Morse code Signalling Lamp","description":"\u003ch1\u003eBTH Intermediate Lantern Morse code Signalling Lamp\u003c\/h1\u003e\n\u003cp\u003eThis wonderful looking gadget is a 1950s BTH Intermediate Lantern Morse code Signalling Lamp. Admiralty Pattern W2174 LM 6-4 serial number B.C 4338. It was manufactured by BTH (British Thomson Houston), who were manufacturers of the iconic ‘Aldis Lamp.’ Used extensively by allied Navies during WW2 for Morse communication when ships were running ‘dark’ in radio silence.\u003c\/p\u003e\n\u003cp\u003eTo send a signal, the user depresses the trigger which in turn moves a metal sleeve away from the internal light source. This produces a pulse of light i.e. morse code. It could be battery or mains operated producing 2-2000 candlepower.\u003c\/p\u003e\n\u003cp\u003eThis particular example is in good used cosmetic condition. It works when connected to a battery but has not been tested to see if it is working using Main’s electricity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLabels on the lamp:-\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSwitch Off After Use\u003cbr\u003ePatent No. ??? (unable to read)\u003c\/p\u003e\n\u003cp\u003eBTH British Thomson Houston Aldis Lamp\u003cbr\u003e1954\u003cbr\u003eAdmiralty Pattern W2174 LM 6-4\u003cbr\u003eSerial number B.C 4338\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size:-\u003c\/strong\u003e\u003cbr\u003eExternal Diameter of Face: 8.7cm\u003cbr\u003eExternal Diameter of Rear: 6.4cm\u003cbr\u003eLength:- 17.7cm (7″)\u003cbr\u003eDistance from top of sight to bottom of handle:- 26cm\u003c\/p\u003e\n\u003cp\u003eA fantastic piece of history for a \u003ca href=\"https:\/\/mullard-antiques-and-collectibles.myshopify.com\/collections\/vintage-antique-lamps-lighting-industrial-military-transport-lights-lamps-lanterns\" target=\"_blank\" rel=\"noopener noreferrer\"\u003evintage lamp\u003c\/a\u003e or \u003ca href=\"https:\/\/mullard-antiques-and-collectibles.myshopify.com\/collections\/militaria\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cstrong\u003emilitaria collector!\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e","brand":"BTH British Thomson Houston","offers":[{"title":"Default Title","offer_id":31882500898860,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC04167.jpg?v=1580587371","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/bth-intermediate-lantern-morse-code-signalling-lamp","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}