{"product_id":"bestfit-mainspring-183z-for-buren-caliber-690-691-pocket-watch-alloy","title":"BESTFIT Mainspring 183Z for Buren 690, 691, Elgin 677 Pocket Watch - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eBESTFIT \u003c\/strong\u003eMainspring 183Z \u003cem\u003e\u003c\/em\u003efor Buren caliber 690, 691 Pocket Watch movements, alloy, new in envelope. Mainspring is also suitable for use in Elgin Grade 677 movements as they were Buren based. \u003cspan style=\"font-size: 14px;\"\u003eSee image for precise mainspring specifications. I likely have several of these so the one you get may differ from the images.\u003c\/span\u003e 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\/span\u003e\u003c\/p\u003e","brand":"BESTFIT","offers":[{"title":"Default Title","offer_id":48590793802036,"sku":"PMS-BEST183ZA-05","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-05-2011.19.32.jpg?v=1747765531","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-mainspring-183z-for-buren-caliber-690-691-pocket-watch-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}