{"product_id":"watch-craft-mainspring-3808w-for-font-28-28-2n-175-186-puw-570-elgin-629-790-alloy","title":"WATCH-CRAFT Mainspring 3808W for Font 28, 28-2N, 175, 186, PUW 570, Elgin 629, 790 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eWATCH-CRAFT \u003c\/strong\u003eMainspring 3808W for Font 28, 28-2N, 175, 186, PUW 570, Elgin 629, 790 caliber movements \u003cspan style=\"font-size: 14px;\"\u003eplus many similar ébauche watches\u003c\/span\u003e, white alloy, new in envelope. See images for precise mainspring specifications. FF 186 was the basis for a plethora of Swiss watches from the likes of Calvert \u0026amp; Harvel while the FF 28 was the basis for a similar number of Swiss watches from Helbros, Winton, Alpina \u0026amp; Dugena. 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\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49346454946100,"sku":"PMS-CEM3808WA-10","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-10-2520.40.19.jpg?v=1792986439","url":"https:\/\/www.vintagetimeparts.com\/products\/watch-craft-mainspring-3808w-for-font-28-28-2n-175-186-puw-570-elgin-629-790-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}