{"product_id":"bestfit-mainspring-411m-for-felsa-177-movado-205-venus-125-126-alpina-490-alloy","title":"BESTFIT Mainspring 411M for ETA 734 thru 739, Eterna 710, Marvin 610 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eBESTFIT \u003c\/strong\u003eMainspring 411M for ETA 734 thru 739, Eterna 710, Marvin 610 caliber movements and perhaps others as well including several non-automatic Wittnauer movements, white alloy, new in envelope.  See images for urther details and 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. \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BESTFIT","offers":[{"title":"Default Title","offer_id":49106494914868,"sku":"PMS-BEST411MA-04","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-05-18_16.30.32.jpg?v=1779147327","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-mainspring-411m-for-felsa-177-movado-205-venus-125-126-alpina-490-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}