{"product_id":"electrical-resistance-box-qty-2","title":"Electrical resistance box Qty 1","description":"\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eGambrell Bros. resistance box, London. A precision plug-type resistance box used for laboratory measurement, bridge work and telegraph\/cable testing. Brass terminals and removable plugs allow accurate selection of known resistance values for calibration and circuit comparison. Marked “Gambrell’s Patent,” reflecting specialist late Victorian instrument manufacture. c.1890s–1910s.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eW22 x D20 x H16 cm.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReplacement value £500\u003c\/p\u003e","brand":"Gambrell Brothers","offers":[{"title":"Default Title","offer_id":53135248130387,"sku":"ELE-770","price":40.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8674\/0307\/files\/scientific_electrical_resistance_box_Industrial_powerhouse_props_prop_rental_hire_vintage_movie_film_set_dec.jpg?v=1772280233","url":"https:\/\/powerhouseprops.co.uk\/products\/electrical-resistance-box-qty-2","provider":"Powerhouse Props","version":"1.0","type":"link"}