{"product_id":"swartchild-black-shield-mainspring-for-illinois-16s-new-model-no-47317-steel","title":"Swartchild Black Shield Mainspring for Illinois 16s New Model No. 47317 - Steel","description":"\u003cp\u003e\u003cstrong\u003eSwartchild \u003c\/strong\u003e\u0026amp; Co \u003cem\u003eBlack Shield\u003c\/em\u003e Mainspring No.4379 for \u003cstrong\u003eIllinois\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003eNew Model, Factory No. 47317, steel, new in envelope. See images for further details. 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 \nunconditionally guaranteed. mages do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Swartchild","offers":[{"title":"Default Title","offer_id":47452784918836,"sku":"PMA-SWA4379S-09","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-09-27_17.15.27.jpg?v=1790554555","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-mainspring-for-illinois-16s-new-model-no-47317-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}