{"product_id":"marco-mainspring-231p-for-12s-waltham-17j-no-2224a-2279-alloy","title":"Marco Mainspring 231P for 12s Waltham 17j No. 2224A \/ 2279 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring 231P for 12s \u003cstrong\u003eWaltham\u003c\/strong\u003e 17j Model 1894, Factory number 2224A \/ 2279, alloy, hole end, 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":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":48908204245300,"sku":"PMA-CEM0231PA-10","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-2911.04.12.jpg?v=1759169199","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-231p-for-12s-waltham-17j-no-2224a-2279-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}