{"product_id":"electrical-resistance-box-qty-1","title":"Electrical resistance box Qty 1","description":"\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eW. \u0026amp; J. George \u0026amp; Becker Ltd resistance decade box, Birmingham \u0026amp; London. A precision plug-in resistance box used to select known resistance values for calibration, bridge work and laboratory testing. Brass bars and removable plugs allow accurate substitution of resistances in circuit measurements. Supplied in a dovetailed wooden case for laboratory and field use. c.1920s–1940s.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eW29 x D17 x H18 cm.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReplacement value £400\u003c\/p\u003e","brand":"W \u0026 J GEORGE \u0026 BECKER LTD","offers":[{"title":"Default Title","offer_id":53135227486547,"sku":"ELE-769","price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8674\/0307\/files\/electrical_resistance_box_scientific_Industrial_powerhouse_props_prop_rental_hire_vintage_movie_film_set_dec.jpg?v=1772279716","url":"https:\/\/powerhouseprops.co.uk\/products\/electrical-resistance-box-qty-1","provider":"Powerhouse Props","version":"1.0","type":"link"}