{"product_id":"nivaflex-unbreakable-mainspring-n6389-for-as-1475-alarm-bulova-13an-11aerc-fef-290-330-310-340-alloy","title":"Nivaflex Unbreakable Mainspring N6389 for AS 1475 Alarm, Bulova 13AN, 11AERC, FEF 290, 330, 310 \u0026 340 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eNivaflex \u003c\/strong\u003eUnbreakable\u003cstrong\u003e \u003c\/strong\u003eMainspring N 6389 for AS 1475 Alarm (TIME side), Bulova 13AN, 11AERC, PUW 60, 61, 63, 65, Fleurier 290, 330, 310, 340 caliber movements plus perhaps many more similar ébauche watches, white alloy. 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":48600959582516,"sku":"PMS-NIVAN6389A-06","price":15.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-05-2720.12.44.jpg?v=1748402445","url":"https:\/\/www.vintagetimeparts.com\/products\/nivaflex-unbreakable-mainspring-n6389-for-as-1475-alarm-bulova-13an-11aerc-fef-290-330-310-340-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}