{"product_id":"nutemper-mainspring-652-for-21-0s-hamilton-no-2921-steel","title":"NuTemper Mainspring #652 for 21\/0s Hamilton No. 2921 - Steel","description":"\u003cp\u003e\u003cstrong\u003eNuTemper\u003c\/strong\u003e \u003cem\u003e\u003c\/em\u003e Mainspring #652 for 21\/0s \u003cstrong\u003eHamilton\u003c\/strong\u003e Grade 995 Movements, Factory No. 2921, 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 and all watch parts are guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"NuTemper","offers":[{"title":"Default Title","offer_id":49069900235060,"sku":"PMA-NUT0652S-03","price":2.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-2219.50.07.jpg?v=1774234389","url":"https:\/\/www.vintagetimeparts.com\/products\/nutemper-mainspring-652-for-21-0s-hamilton-no-2921-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}