{"product_id":"marco-mainspring-731-for-ny-standard-12s-excelsior-no-1322-steel","title":"Marco Mainspring #731 for NY Standard 12s Excelsior No. 1322 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring No. 731 for NY Standard 12s Excelsior model movements, Factory No. 1322, 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 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":48875122393396,"sku":"PMA-CEM0731S-08","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-2710.20.22_245cd1f8-643a-4327-a80d-046c3efa963f.jpg?v=1756316565","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-731-for-ny-standard-12s-excelsior-no-1322-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}