{"product_id":"bestfit-mainspring-ja553-for-0s-rockford-1077-alloy","title":"BESTFIT Mainspring JA553 for 0s Rockford No. 1077 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eBESTFIT \u003c\/strong\u003eMainspring JA-553 for\u003cstrong\u003e Rockford \u003c\/strong\u003e0s Movements, Factory No. 1077, T end, 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item. \u003cbr\u003e\u003c\/p\u003e","brand":"BESTFIT","offers":[{"title":"Default Title","offer_id":47451956117812,"sku":"PMA-MSJA553A-09","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-05_10.13.26.jpg?v=1757092486","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-mainspring-ja553-for-0s-rockford-1077-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}