{"product_id":"usr-mainspring-for-n-y-standard-18s-no-2189-steel","title":"USR Mainspring for N.Y. Standard 18s No. 2189 - Steel","description":"\u003cp\u003e\u003cstrong\u003eUSR\u003c\/strong\u003e Mainspring for \u003cstrong\u003eN.Y. Standard\u003c\/strong\u003e 18s movements, Factory No. 2189, HOLE end, steel, new in envelope. This is marked No. 925 which is curious as I don't see than number ever being used, and I'll also note that the strength of these Standard mainsprings can vary widely so I checked this one and it has a strength of 0.23 so this will work nicely down to a 7j. 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 suitable job of representing the item\u003c\/p\u003e","brand":"USR","offers":[{"title":"Default Title","offer_id":47452441510196,"sku":"PMA-USR2189S-06","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-07-0914.11.58.jpg?v=1752095908","url":"https:\/\/www.vintagetimeparts.com\/products\/usr-mainspring-for-n-y-standard-18s-no-2189-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}