{"product_id":"national-unbreakable-mainspring-for-elgin-grade-700-no-6697-alloy","title":"National Unbreakable Mainspring for Elgin Grade 700 No. 6693 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eNational\u003c\/strong\u003e Unbreakable\u003cem\u003e\u003c\/em\u003e Mainspring for \u003cstrong\u003eElgin\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003eGrade 700 Movements, Factory No. 6693, alloy, new in envelope. See image for further details. 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":"National","offers":[{"title":"Default Title","offer_id":48859714322740,"sku":"PMA-NAT6693A-08","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-1612.14.41.jpg?v=1755371964","url":"https:\/\/www.vintagetimeparts.com\/products\/national-unbreakable-mainspring-for-elgin-grade-700-no-6697-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}