{"product_id":"marco-mainspring-3247-for-as-caliber-1220-1221-steel","title":"Marco Mainspring #3247 for AS caliber 1220, 1221, 1298, GP 13, 14 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring No. 3247 for AS 1220, 1221, 1298, Girard Perregaux 13, 14 caliber movements and perhaps others, steel, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":48980530266420,"sku":"PMS-CEM3247S-12","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-05-11_10.46.50.jpg?v=1778521642","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3247-for-as-caliber-1220-1221-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}