{"product_id":"hr-nivastar-mainspring-ga50-for-as-1320-1323-bulova-9as-9asc-10brc-rolex-tudor-1410-1413-alloy","title":"HR Nivastar Mainspring GA50 for AS 1320, 1323, Bulova 9AS, 9ASC, 10BRC, Rolex \/ Tudor, 1410, 1413 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eHR \u003c\/strong\u003e\u003cem\u003eNivastar\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e \u003c\/em\u003e\u003c\/strong\u003eMainspring GA50 for AS 1320, 1323, Bulova 9AS, 9ASC, 10BRC, Rolex \/ Tudor 1410, 1413, Benrus CL caliber Automatic movements, white alloy, with attached bridle, 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 is 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":49339875524916,"sku":"PMS-HRNSGA50A-10","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-10-1919.33.45.jpg?v=1792463742","url":"https:\/\/www.vintagetimeparts.com\/products\/hr-nivastar-mainspring-ga50-for-as-1320-1323-bulova-9as-9asc-10brc-rolex-tudor-1410-1413-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}