{"product_id":"hr-mainspring-no-490-for-bulova-4ar-steel","title":"HR Mainspring No. 490 for Bulova caliber 4AR - Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHR\u003c\/strong\u003e Mainspring No. 490 for \u003cstrong\u003eBulova\u003c\/strong\u003e caliber 4AR movements plus perhaps other similar ébauche watches, steel, new in envelope. See images for precise mainspring specifications.  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 marginally adequate job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"HR","offers":[{"title":"Default Title","offer_id":48880405610804,"sku":"PMS-HRA0490-09","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-0114.44.12.jpg?v=1756763224","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-mainspring-no-490-for-bulova-4ar-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}