{"product_id":"nivaflex-unbreakable-mainspring-for-eta-1240-eterna-1244-benrus-bn-alloy","title":"Nivaflex Unbreakable Mainspring for ETA 1240, Eterna 1244, Benrus BN - Alloy","description":"\u003cp\u003e\u003cstrong\u003eNivaflex\u003c\/strong\u003e Unbreakable Mainspring for ETA caliber 1240, Eterna caliber 1244 and Benrus caliber BN movements, white 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":49305193709876,"sku":"PMS-NIVA1240A-09","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-09-2910.24.42_254bf76d-2205-45cd-bc46-4db8c28c5dce.jpg?v=1790703079","url":"https:\/\/www.vintagetimeparts.com\/products\/nivaflex-unbreakable-mainspring-for-eta-1240-eterna-1244-benrus-bn-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}