{"product_id":"marco-mainspring-3133-for-17-ligne-buren-caliber-18-12-movements-steel","title":"Marco Mainspring #3133 for 17 ligne Buren caliber 18\/12 movements - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003esteel mainspring #3133 for 17 ligne \u003cstrong\u003eBuren\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003ecaliber 18\/12 movements, and perhaps others. 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":48891850752308,"sku":"PMS-CEM3133S-09","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-1211.12.47.jpg?v=1757700983","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3133-for-17-ligne-buren-caliber-18-12-movements-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}