{"product_id":"nivaflex-unbreakable-mainspring-n5103-for-felsa-350-351-352-puw-49-as-1393-tissot-17-5-alloy","title":"Nivaflex Unbreakable Mainspring N5103 for Felsa 350, 351, 352, PUW 49, Tissot 17.5 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eNivaflex\u003c\/strong\u003e \u003cem\u003eUnbreakable\u003c\/em\u003e mainspring N 5103 for Felsa 350, 351, 352, A. Michel 115, PUW 49, Tissot 17.5  caliber movements plus perhaps other similar \u003cspan class=\"st\"\u003eébauche\u003c\/span\u003e movements as well, alloy, new in envelope. See images for precise mainspring specifications. 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":"Nivaflex","offers":[{"title":"Default Title","offer_id":48610836349236,"sku":"PMS-NIVAN5103A-06","price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-06-0318.29.37.jpg?v=1749000823","url":"https:\/\/www.vintagetimeparts.com\/products\/nivaflex-unbreakable-mainspring-n5103-for-felsa-350-351-352-puw-49-as-1393-tissot-17-5-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}