{"product_id":"hr-quick-fit-mainspring-k304-for-gruen-caliber-235-430-431-435-440-alloy","title":"HR Quick Fit Mainspring K304 for Gruen caliber 235, 430, 431, 435, 440 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHR \u003c\/strong\u003e\u003cem\u003eQuick Fit \u003c\/em\u003eMainspring K304 for Gruen 235, 430, 431, 435, 440 caliber movements plus perhaps other similar ébauche watches, 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 an adequate job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"HR","offers":[{"title":"Default Title","offer_id":49125868962100,"sku":"PMS-HRQFK304A-05","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2024-02-0915.33.05.jpg?v=1707521694","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-quick-fit-mainspring-k304-for-gruen-caliber-235-430-431-435-440-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}