{"product_id":"nutemper-mainspring-no-88-for-gruen-caliber-520-steel","title":"NuTemper Mainspring No. 88 for Gruen caliber 520 - Steel","description":"\u003cp\u003e\u003cb\u003eNuTemper \u003c\/b\u003eMainspring No. 88 for \u003cstrong\u003eGruen\u003c\/strong\u003e caliber 520 movements and perhaps others, steel, 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 an adequate job of representing the item.\u003c\/p\u003e","brand":"NuTemper","offers":[{"title":"Default Title","offer_id":49148471771444,"sku":"PMS-NUT0088S-06","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-06-0420.01.24.jpg?v=1780628604","url":"https:\/\/www.vintagetimeparts.com\/products\/nutemper-mainspring-no-88-for-gruen-caliber-520-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}