{"product_id":"marco-mainspring-3228-for-bulova-4am-6ea-eta-746-recta-m-mv-108-109-steel","title":"Marco Mainspring #3228 for Bulova 4AM, 6EA, ETA 746, Recta M, MV, 108, 109 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring #3228 for Bulova 4AM, 6EA, ETA 746, Recta M, MV, 108, 109, Benrus BU caliber movements and perhaps others, steel, new in envelope. 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":48874284482868,"sku":"PMS-CEM3228S-08","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-2620.39.53.jpg?v=1756266041","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3228-for-bulova-4am-6ea-eta-746-recta-m-mv-108-109-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}