{"product_id":"bestfit-mainspring-ja355-for-12s-e-howard-pocket-watches-no-553-alloy","title":"BESTFIT Mainspring JA355 for 12s E. Howard Pocket Watches No. 553 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eBESTFIT \u003c\/strong\u003eMainspring MS-JA355 for 12s \u003cstrong\u003eE. Howard\u003c\/strong\u003e Pocket Watch movements, Factory No. 553, T End, alloy, new in envelope. See images for precise mainspring specifications. I may have several of these so the one you get may differ slightly from the images. I specialize is 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":"Bestfit","offers":[{"title":"Default Title","offer_id":48874192339252,"sku":"PMA-MSJA355A-08","price":12.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-2620.05.41.jpg?v=1756264101","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-mainspring-ja355-for-12s-e-howard-pocket-watches-no-553-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}