{"product_id":"swartchild-black-shield-mainspring-for-12s-south-bend-no-55528-steel","title":"Swartchild Black Shield Mainspring #4374B for 12s South Bend No. 55528 - Steel","description":"\u003cp\u003e\u003cstrong\u003eSwartchild\u003c\/strong\u003e \u003cem\u003eBlack Shield\u003c\/em\u003e Mainspring No. 4374B for 12s \u003cstrong\u003eSouth Bend\u003c\/strong\u003e 1st Model movements, Factory No. 55528, steel, new in envelope. See images for further details and 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 pretty good job of representing the item.\u003c\/p\u003e","brand":"Swartchild","offers":[{"title":"Default Title","offer_id":47451913060660,"sku":"PMA-SWBS4374BS-01","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/products\/1109602654.jpg?v=1705274961","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-mainspring-for-12s-south-bend-no-55528-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}