{"product_id":"marco-mainspring-492-for-hamilton-22-0s-no-6221-steel","title":"Marco Mainspring #492 for Hamilton 22\/0s No. 6221 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring No  492 for \u003cstrong\u003eHamilton \u003c\/strong\u003e\u003cstrong\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e22\/0s movements, Factory No. 6221, steel, new in envelope. See images for further details. 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":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49159709262132,"sku":"PMA-CEM0492S-06","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-06-1418.40.14.jpg?v=1781487762","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-492-for-hamilton-22-0s-no-6221-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}