{"product_id":"jurgensen-mainspring-639a-for-elgin-10-0s-factory-no-1957-steel","title":"Jurgensen Mainspring #639A for Elgin 10\/0s Factory No. 1957 - Steel","description":"\u003cp\u003e\u003cstrong\u003eJurgensen \u003c\/strong\u003eMainspring #639A for \u003cstrong\u003eElgin\u003c\/strong\u003e 10\/0s, Factory No. 1957, steel, new in envelope. See images for further details and precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Jurgensen","offers":[{"title":"Default Title","offer_id":49305206128948,"sku":"PMA-JURG639AS-09","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-09-2910.47.56.jpg?v=1790704450","url":"https:\/\/www.vintagetimeparts.com\/products\/jurgensen-mainspring-639a-for-elgin-10-0s-factory-no-1957-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}