{"product_id":"dynaflex-unbreakable-mainspring-for-gruen-430-431-435-440-alloy","title":"Dynaflex Unbreakable Mainspring for Gruen 430, 431, 435, 440 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eDynaflex\u003c\/strong\u003e \u003cem\u003eUnbreakable\u003c\/em\u003e Mainspring for \u003cstrong\u003eGruen\u003c\/strong\u003e caliber 430, 431, 435, 440 movements, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ very sightly from the images. I specialize in 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":"Dynaflex","offers":[{"title":"Default Title","offer_id":48423179125044,"sku":"PMS-DYNFO430A-01","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-01-1210.59.11.jpg?v=1736708406","url":"https:\/\/www.vintagetimeparts.com\/products\/dynaflex-unbreakable-mainspring-for-gruen-430-431-435-440-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}