{"product_id":"cas-ker-mainspring-ja-111-for-12s-elgin-pocket-watches-2874-alloy","title":"Cas-Ker Mainspring JA111 for 12s Elgin Pocket Watches #2874 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eCas-Ker \u003c\/strong\u003eMainspring JA-111 for 12s \u003cstrong\u003eElgin \u003c\/strong\u003emovements, likely made by Bestfit, Factory No. 2874, alloy, new in open package. 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 suitable job of representing the item.\u003c\/p\u003e","brand":"Bestfit","offers":[{"title":"Default Title","offer_id":47733556576564,"sku":"PMA-MSJA111A-08","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-08-2413.40.37.jpg?v=1787604095","url":"https:\/\/www.vintagetimeparts.com\/products\/cas-ker-mainspring-ja-111-for-12s-elgin-pocket-watches-2874-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}