{"product_id":"marco-mainspring-3030-for-buren-caliber-40-45-steel","title":"Marco Mainspring #3130 for Buren caliber 40, 45 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003esteel mainspring No. 3130 for \u003cstrong\u003eBuren \u003c\/strong\u003ecaliber 40, 45 movements, and perhaps others as well, 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 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":48907521818932,"sku":"PMS-CEM3130S-09","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-01-22_19.12.02.jpg?v=1769137978","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3030-for-buren-caliber-40-45-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}