{"product_id":"hr-nivstar-mainspring-g721-for-amida-520-as-1290-alloy","title":"HR Nivstar Mainspring G721 for Amida 520, AS 1290 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eHR \u003c\/strong\u003e\u003cem\u003eNivastar \u003c\/em\u003eMainspring G721 for Amida 520, AS 1290 caliber movements, white 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 a pretty good job of representing the item.\u003c\/p\u003e","brand":"HR","offers":[{"title":"Default Title","offer_id":49000245821748,"sku":"PMS-HRNSG721A-01","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-01-1912.02.28.jpg?v=1768853118","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-nivstar-mainspring-g721-for-amida-520-as-1290-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}