{"product_id":"scg11896-john-harrison-marine-timekeeper-no-4-great-britain-1993","title":"SCG11896 - John Harrison Marine Timekeeper No. 4 – Great Britain 1993","description":"\u003cp data-start=\"179\" data-end=\"917\"\u003e\u003cem\u003eThis stamp from Great Britain commemorates \u003cstrong data-start=\"241\" data-end=\"270\"\u003eJohn Harrison (1693–1776)\u003c\/strong\u003e, the pioneering clockmaker whose marine chronometers revolutionized navigation by enabling accurate determination of longitude at sea. Issued in \u003cstrong data-start=\"416\" data-end=\"424\"\u003e1993\u003c\/strong\u003e, the design features the intricately engraved \u003cstrong data-start=\"471\" data-end=\"503\" data-is-only-node=\"\"\u003eMarine Timekeeper No. 4 (H4)\u003c\/strong\u003e, Harrison’s most successful precision instrument completed in 1759. The detailed depiction highlights the ornate craftsmanship and mechanical precision that transformed maritime exploration and global trade. This issue is highly valued by collectors interested in \u003cstrong data-start=\"768\" data-end=\"827\"\u003escientific innovation, horology, and navigation history\u003c\/strong\u003e, representing one of the most important technological breakthroughs in seafaring history.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-start=\"919\" data-end=\"1000\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e \u003c\/p\u003e","brand":"Stamp and Cover Galaxy","offers":[{"title":"Default Title","offer_id":46198304604331,"sku":null,"price":20.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/2406\/6475\/files\/jimin_6_f2009c93-e799-4051-b58b-1491779bbda0.jpg?v=1770727815","url":"https:\/\/stampandcovergalaxy.com\/products\/scg11896-john-harrison-marine-timekeeper-no-4-great-britain-1993","provider":"Stamp and Cover Galaxy","version":"1.0","type":"link"}