{"product_id":"rn-mainspring-for-hamilton-6-0s-no-2321-2521-steel","title":"RN Mainspring for Hamilton 6\/0s No. 2321 \/ 2521 - Steel","description":"\u003cp\u003e\u003cstrong\u003eRN \u003c\/strong\u003eMainspring for \u003cstrong\u003eHamilton \u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e6\/0s movements, Factory No. 2321 \/ 2521, steel, new in dirty  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 unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"RN","offers":[{"title":"Default Title","offer_id":49183995953460,"sku":"PMA-RNHA2521S-07","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-07-0418.00.04.jpg?v=1783213374","url":"https:\/\/www.vintagetimeparts.com\/products\/rn-mainspring-for-hamilton-6-0s-no-2321-2521-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}