{"product_id":"nivaflex-unbreakable-mainspring-n5107-for-universal-245-257-alloy","title":"Nivaflex Unbreakable Mainspring N5107 for Universal 245, 257 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eNivaflex \u003c\/strong\u003eUnbreakable\u003cstrong\u003e \u003c\/strong\u003eMainspring N 5107\u003cem\u003e \u003c\/em\u003efor \u003cstrong\u003eUniversal\u003c\/strong\u003e 245, 257 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 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\/span\u003e\u003c\/p\u003e","brand":"Nivaflex","offers":[{"title":"Default Title","offer_id":48603410596148,"sku":"PMS-NIVAN5107A-06","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-05-2819.16.47.jpg?v=1748485206","url":"https:\/\/www.vintagetimeparts.com\/products\/nivaflex-unbreakable-mainspring-n5107-for-universal-245-257-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}