{"product_id":"wwii-us-navy-model-obu-3-echo-box-test-set-ships-308-a-manual-1944-confidential","title":"WWII US Navy Model OBU-3 Echo Box Test Set SHIPS 308-A Manual 1944 Confidential","description":"\u003cp\u003e\u003cspan\u003eOriginal \u003c\/span\u003e\u003cspan\u003ePreliminary Instruction Book\u003c\/span\u003e\u003cspan\u003e for the \u003c\/span\u003e\u003cspan\u003eModel OBU-3 Echo Box Test Set (SHIPS 308-A)\u003c\/span\u003e\u003cspan\u003e, manufactured for the \u003c\/span\u003e\u003cspan\u003eU.S. Navy Department, Bureau of Ships\u003c\/span\u003e\u003cspan\u003e by \u003c\/span\u003e\u003cspan\u003eJohnson Service Company, Milwaukee, Wisconsin\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis manual is dated \u003c\/span\u003e\u003cspan\u003eJune 15, 1944\u003c\/span\u003e\u003cspan\u003e and is marked \u003c\/span\u003e\u003cspan\u003e“Confidential (Non-Registered)”\u003c\/span\u003e\u003cspan\u003e, making it an interesting piece of WWII U.S. Navy electronics and radar test equipment history. The manual relates to the OBU-3 Echo Box Test Set used in the maintenance and testing of naval electronic systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eOriginal WWII U.S. Navy manual\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eModel \u003c\/span\u003e\u003cspan\u003eOBU-3 Echo Box Test Set\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eSHIPS 308-A\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eBureau of Ships publication\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eDated \u003c\/span\u003e\u003cspan\u003eJune 15, 1944\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eMarked \u003c\/span\u003e\u003cspan\u003eConfidential (Non-Registered)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eManufactured by \u003c\/span\u003e\u003cspan\u003eJohnson Service Company\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eOriginal black textured binder\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eFREE SHIPPING\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e#4\u003c\/span\u003e\u003c\/p\u003e","brand":"Whiskey Rebellion Antiques","offers":[{"title":"Default Title","offer_id":43299693789261,"sku":null,"price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9229\/8829\/files\/IMG-0941_428378d3-1898-4a5a-9d5e-bb4f09e71705.heic?v=1784816094","url":"https:\/\/whiskeyrebellionantiques.com\/products\/wwii-us-navy-model-obu-3-echo-box-test-set-ships-308-a-manual-1944-confidential","provider":"Whiskey Rebellion Antiques","version":"1.0","type":"link"}