{"product_id":"jurgensen-mainspring-for-hamilton-12s-factory-no-1228-steel","title":"Jurgensen Mainspring for Hamilton 12s Factory No. 1228 - Steel","description":"\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eJurgensen\u003c\/strong\u003e Mainspring from \u003cstrong\u003eHamilton\u003c\/strong\u003e 12s movements, Factory No. 1228, 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 unconditionally guaranteed. Images do a satisfactory job of representing the item.\u003c\/p\u003e","brand":"Jurgensen","offers":[{"title":"Default Title","offer_id":49037500055860,"sku":"PMA-JURG1228S-02","price":3.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-02-0816.31.14.jpg?v=1770597204","url":"https:\/\/www.vintagetimeparts.com\/products\/jurgensen-mainspring-for-hamilton-12s-factory-no-1228-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}