{"product_id":"hr-nivastar-mainspring-g563-for-tissot-23-3r-21-lemanis-4550-4500-alloy","title":"HR Nivastar Mainspring G563 for Tissot 23.3R-21, Lemanis 4550, 4500 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eHR\u003c\/strong\u003e \u003cem\u003eNivastar\u003c\/em\u003e Mainspring G563 for Tissot 23.3R-21, Lemania 4550, 4500, Bulova 6AN caliber movements plus perhaps others, 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\/p\u003e","brand":"HR","offers":[{"title":"Default Title","offer_id":49108780974388,"sku":"PMS-HRNSG563A-05","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-04-2812.01.45.jpg?v=1777403145","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-nivastar-mainspring-g563-for-tissot-23-3r-21-lemanis-4550-4500-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}