{"product_id":"watch-craft-mainspring-2991w-for-gruen-833-rolex-250-size-o-355-alloy","title":"WATCH-CRAFT Mainspring 2991W for Gruen 833, Rolex 250 (size O), 355 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eWATCH-CRAFT \u003c\/strong\u003eMainspring 2991W for Gruen caliber 833, Rolex caliber 250 (size O) \u0026amp; caliber 355 \u003c\/span\u003e\u003cspan style=\"font-size: 14px;\"\u003emovements 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 a pretty good job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49073418961204,"sku":"PMS-CEM2991A-04","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-2814.45.46.jpg?v=1774734669","url":"https:\/\/www.vintagetimeparts.com\/products\/watch-craft-mainspring-2991w-for-gruen-833-rolex-250-size-o-355-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}