{"product_id":"marco-marshalloy-mainspring-3918m-for-bfg-caliber-866-875-alloy","title":"Marco Marshalloy Mainspring 3918M for BFG caliber 866, 875 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eMarco \u003c\/strong\u003e\u003cem\u003eMarshalloy\u003c\/em\u003e\u003cstrong\u003e \u003c\/strong\u003eMainspring 3918M for \u003cstrong\u003eBFG\u003c\/strong\u003e caliber 866, 875 movements plus perhaps similar ébauche watches, white 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 in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49098492674356,"sku":"PMS-CEM3918MA-04","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-04-1520.45.44.jpg?v=1776311166","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-marshalloy-mainspring-3918m-for-bfg-caliber-866-875-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}