{"product_id":"caldwell-signal-bonds-tin-wwii-ear-electric-railway-improvement-co","title":"Caldwell Signal Bonds Tin WWII Ear - Electric Railway Improvement Co","description":"\u003cp\u003e\u003cspan class=\"rQesXe MPyX\"\u003eThis\u003c\/span\u003e\u003cspan class=\"rQesXe MPyX\"\u003e listing is for a WWII Vintage Square Red tin that once contained Caldwell Signal Bonds As produced by the Electric Railway Improvement Company, of Cleveland, Ohio. A quick search on google produced the information written below. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"rQesXe MPyX\"\u003eThe tin is a 4\" cube with aged patina.  If there was an expiration label this is missing.  Please see all images for further details of the items condition. Nice display piece. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong class=\"rQesXe MPyX\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif, \"Noto Color Emoji\"; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e\"Historical Context:\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e Dr. Charles Caldwell invented this exothermic welding process in 1938, and it was patented in 1939. These specific industrial tins commonly feature a stamped expiration warning on the side panels (e.g., \"Use this metal before 12-43\" or \"before 7-1-43\"), making them a direct artifact of WWII-era railroad infrastructure maintenance\"\u003c\/p\u003e","brand":"MGJ2PILOT","offers":[{"title":"Default Title","offer_id":54535386890558,"sku":"CS14-2026","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0815\/5725\/8558\/files\/IMG_E2068.jpg?v=1790800009","url":"https:\/\/mgj2pilot.com\/products\/caldwell-signal-bonds-tin-wwii-ear-electric-railway-improvement-co","provider":"MGJ2PILOT","version":"1.0","type":"link"}