{"product_id":"marco-mainspring-2929-for-concord-38-as-690-1279-8-day-movement-steel","title":"Marco Mainspring #2929 for Concord 38, AS 690, 1279 8-Day Movement - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring No. 2929 for Concord 38, AS 690, 1279 caliber 8-day movements and perhaps others, new in envelope. These are for movements designed to run for 8 days, which include primarily car and travel clock movements. See images for precise mainspring specifications. I specialize in 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":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49330816319796,"sku":"CMS-CEM2929S-10","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-10-1317.27.21.jpg?v=1791938077","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-2929-for-concord-38-as-690-1279-8-day-movement-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}