{"product_id":"marathon-mainspring-422-for-hamilton-18-0s-no-2721-steel","title":"Marathon Mainspring #422 for Hamilton 18\/0s No. 2721 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarathon \u003c\/strong\u003esteel mainspring #422 for \u003cstrong\u003eHamilton\u003c\/strong\u003e 18\/0s movements, Factory No. 2721, new in envelope. See images for precise mainspring specifications. 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":"Marathon","offers":[{"title":"Default Title","offer_id":48506067714356,"sku":"PMA-MAR0422S-03","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-03-1513.55.57.jpg?v=1742072287","url":"https:\/\/www.vintagetimeparts.com\/products\/marathon-mainspring-422-for-hamilton-18-0s-no-2721-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}