{"product_id":"marco-mainspring-258p-for-waltham-7-ligne-movements-2243-2266-alloy","title":"Marco Mainspring 258P for Waltham 7½ ligne movements 2243 \/ 2266 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring 258P for \u003cstrong\u003eWaltham\u003c\/strong\u003e for 7½ ligne movements, Factory No. 2243 \/ 2266, alloy, 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 is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. See image for further details. Images do an adequate good job of representing the item.\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":48901801247028,"sku":"PMA-CEM0258PA-09","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-2113.42.36.jpg?v=1758487552","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-258p-for-waltham-7-ligne-movements-2243-2266-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}