{"product_id":"hr-nivastar-mainspring-g343-for-cortebert-601-653-gruen-126-127-179-alloy","title":"HR Nivastar Mainspring G343 for Cortebert 601, 653, Gruen 126, 127, 179 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHR \u003c\/strong\u003e\u003cem\u003eNivastar\u003c\/em\u003e\u003cstrong\u003e \u003c\/strong\u003eMainspring G343 for Cortebert 601, 653, Gruen 126, 127, 179 caliber movements plus perhaps other similar ébauche watches, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"HR","offers":[{"title":"Default Title","offer_id":49128440299828,"sku":"PMS-HRNSG343A-05","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-05-1518.42.26.jpg?v=1778895971","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-nivastar-mainspring-g343-for-cortebert-601-653-gruen-126-127-179-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}