{"product_id":"marco-mainspring-137-for-12s-elgin-corsican-factory-no-2874-steel","title":"Marco Mainspring #137 for 12s Elgin Corsican 21j Factory No. 2874 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e Mainspring #137 for 12s \u003cstrong\u003eElgin\u003c\/strong\u003e 21j Streamline model Corsican Grade movements, Factory No. 2874, DB\u0026amp;H end, steel, new in frail 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 is hard to find watch parts and all watch parts are unconditionally guaranteed. See image for precise characteristics. Images do a pretty good job of representing the item.\u003cbr\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":48907310268724,"sku":"PMA-CEM0137S-09","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-2713.40.04.jpg?v=1759005744","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-137-for-12s-elgin-corsican-factory-no-2874-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}