{"product_id":"waltham-factory-mainspring-for-3-0s-no-2278-2228-alloy","title":"Waltham Factory Mainspring for 3\/0s No. 2278 \/ 2228 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eWaltham\u003c\/strong\u003e Mainspring for 3\/0s Model 1907 movements, Factory No. 2278 \/ 2228, alloy, new in envelope. This is a pretty uncommon \u003cstrong\u003efactory \u003c\/strong\u003emainspring, although it's pretty easy to find in alloy cataloged as a 2228 from other makers. If your 3\/0s watch calls for a 2228 in this strength (.13) and you want an alloy, this is the correct mainspring for that application. I specialize in hard to find watch parts and all watch parts are \nunconditionally guaranteed. Images do an adequate good job of \nrepresenting the item.  \u003c\/p\u003e","brand":"Waltham","offers":[{"title":"Default Title","offer_id":47452432531764,"sku":"PMA-WAL2278A-12","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/products\/2813016371.jpg?v=1705288912","url":"https:\/\/www.vintagetimeparts.com\/products\/waltham-factory-mainspring-for-3-0s-no-2278-2228-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}