{"product_id":"newall-security-mainspring-403-for-elgin-18s-factory-no-812-steel","title":"Newall Security Mainspring #403 for Elgin 18s Factory No. 812 - Steel","description":"\u003cp\u003e\u003cstrong\u003eNewall\u003c\/strong\u003e \u003cem\u003eSecurity\u003c\/em\u003e Mainspring No. 403 for \u003cstrong\u003eElgin\u003c\/strong\u003e 18s movements, Factory No. 812, steel, 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.\u003c\/p\u003e","brand":"Newall","offers":[{"title":"Default Title","offer_id":49119156568372,"sku":"PMA-NEW0403S-05","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-04-3010.31.33.jpg?v=1777570397","url":"https:\/\/www.vintagetimeparts.com\/products\/newall-security-mainspring-403-for-elgin-18s-factory-no-812-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}