{"product_id":"swartchild-black-shield-mainspring-4396e-for-crown-ny-standard-3-0s-no-1323-steel","title":"Swartchild Black Shield Mainspring 4396E for Crown (NY Standard) 3\/0s No. 1323 - Steel","description":"\u003cp\u003e\u003cstrong\u003eSwartchild \u003c\/strong\u003e\u003cem\u003eBlack Shield\u003c\/em\u003e\u003cstrong\u003e \u003c\/strong\u003eMainspring 4396E for 3\/0s \u003cstrong\u003eCrown\u003c\/strong\u003e, made by New York Standard, Factory No. 1323, steel, new in envelope. See images for further details. Not an easy mainspring to find. I specialize is 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":"Swartchild","offers":[{"title":"Default Title","offer_id":48518932496692,"sku":"PMA-SWA4396ES-04","price":5.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-03-2418.38.59.jpg?v=1742866998","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-mainspring-4396e-for-crown-ny-standard-3-0s-no-1323-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}