{"product_id":"swartchild-black-shield-clock-open-loop-mainspring-4-00-x-33mm-x-24","title":"Swartchild Black Shield Clock OPEN LOOP Mainspring 4.00 x .33mm x 24\"","description":"\u003cp\u003e\u003cstrong\u003eSwartchild \u0026amp; Co \u003c\/strong\u003eClock Mainspring, OPEN LOOP End, Dennison 5\/32 x .013 x 24, from the 1950's, steel, new in envelope. See images for further details. The stain on the envelope is leftover tape sticky-goo. I specialize in hard to find watch \u0026amp; clock parts and all 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":48615959560500,"sku":"CMS-SWRD403324S-06","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-06-0617.39.57.jpg?v=1749257020","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-clock-open-loop-mainspring-4-00-x-33mm-x-24","provider":"Vintage Time Parts","version":"1.0","type":"link"}