{"product_id":"usr-mainspring-for-elgin-56-0s-no-2890-steel","title":"USR Mainspring for Elgin 6\/0s No. 2890 - Steel","description":"\u003cp\u003e\u003cstrong\u003eUSR \u003c\/strong\u003eMainspring for \u003cstrong\u003eElgin\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e 6\/0s Movements, Factory No. 2890, new in envelope. USR is short for Ulysse Sandoz-Robert of La Chaux-de-Fonds, Switzerland. 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":"USR","offers":[{"title":"Default Title","offer_id":48886312010036,"sku":"PMA-USR2890S-09","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-0814.38.52.jpg?v=1757367778","url":"https:\/\/www.vintagetimeparts.com\/products\/usr-mainspring-for-elgin-56-0s-no-2890-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}