{"product_id":"marco-mainspring-552-for-illinois-4s-6s-factory-no-47354-steel","title":"Marco Mainspring #552 for Illinois 4s \u0026 6s Factory No. 47354 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring No. 552 for \u003cstrong\u003eIllinois\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e4s \u0026amp; 6s\u003cstrong\u003e \u003c\/strong\u003e1st Model movements, Factory No. 47354, 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":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49388697223476,"sku":"PMA-CEM0552S-11","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-11-1316.18.17.jpg?v=1794615649","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-552-for-illinois-4s-6s-factory-no-47354-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}