{"product_id":"rezista-mainspring-no-123-for-gruen-caliber-311-400-405-steel","title":"Rezista Mainspring #123½ for Gruen caliber 311, 400, 405 - Steel","description":"\u003cp\u003e\u003cstrong\u003eRezista \u003c\/strong\u003eNo. 123½ mainspring for \u003cstrong\u003eGruen\u003c\/strong\u003e caliber 311, 400, 405 movements, and quite likely many others, steel, 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. \u003cbr\u003e\u003c\/p\u003e","brand":"Rezista","offers":[{"title":"Default Title","offer_id":49210885767476,"sku":"PMS-REZ01235S-07","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-07-2319.49.44.jpg?v=1784861554","url":"https:\/\/www.vintagetimeparts.com\/products\/rezista-mainspring-no-123-for-gruen-caliber-311-400-405-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}