{"product_id":"1930s-vintage-gpo-style-two-pole-dpdt-large-knife-switch","title":"1930s Vintage GPO style Two Pole DPDT Large Knife Switch","description":"\u003ch1\u003e1930s Vintage GPO style Two Pole DPDT Large Knife Switch\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThis amazing looking piece of electrical history is a 1930s Vintage GPO style Two Pole DPDT Large Knife Switch.\u003c\/p\u003e\n\u003cp\u003eEbonite and Brass construction on a Mahogany plinth, the knife switch is a Double Pole Double Throw (DPDT) centre-off, and probably used in an industrial setting e.g Marine\/Factory\/Power Station.  They are often referred to as Frankenstein switches!\u003c\/p\u003e\n\u003cp\u003eThere is no discernible maker's mark. In good condition, we have left the patina but it would also look great polished. There are a few scuffs and surface blemishes but it's in good condition for its age.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBase Width: 18.8 cm \u003c\/li\u003e\n\u003cli\u003eHeight with switch horizontal: 4 cm\u003c\/li\u003e\n\u003cli\u003eBase Depth: 12.4 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe ebonite in the centre of the switch yoke is made from Ebonite\/Paxolin and is there to prevent flashover between the poles at high voltage. It must have been used for very high current applications due to the thickness of the conductor! \u003c\/p\u003e\n\u003cp\u003eA lovely item for collectors of electrical devices or steampunk!\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\" rel=\"noopener noreferrer\"\u003evintage technology.\u003c\/a\u003e\u003c\/p\u003e","brand":"Unknown","offers":[{"title":"Default Title","offer_id":40039398310037,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/IMG_4191.jpg?v=1620649500","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1930s-vintage-gpo-style-two-pole-dpdt-large-knife-switch","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}