{"product_id":"marco-mainspring-2930-for-cortebert-caliber-601-mst-caliber-315-steel","title":"Marco Mainspring #2930 for Cortebert caliber 601, MST caliber 315 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring No. 2930 for Cortebert caliber 601, Meyer \u0026amp; Studeli caliber 315 movements and perhaps others, steel, new in envelope. 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":49073410769204,"sku":"PMS-CEM2930S-04","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-2813.58.27.jpg?v=1774731661","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-2930-for-cortebert-caliber-601-mst-caliber-315-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}