{"product_id":"usr-mainspring-for-12s-seth-thomas-pocket-watch-no-2542","title":"USR Mainspring for 12s Seth Thomas Pocket Watch No 2521 - Steel","description":"\u003cp\u003e\u003cstrong\u003eUSR \u003c\/strong\u003eMainspring for 12s \u003cstrong\u003eSeth Thomas\u003c\/strong\u003e pocket watch movements, Factory No. 2521, steel, new in envelope. Could also very well fit in other movements. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Ignore the paperclip stain on the outside of the envelope, otherwise images do a pretty good job of representing the item. \u003cbr\u003e\u003c\/p\u003e","brand":"USR","offers":[{"title":"Default Title","offer_id":48840738439476,"sku":"PMA-USR2521S-08","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-1213.15.45.jpg?v=1755029834","url":"https:\/\/www.vintagetimeparts.com\/products\/usr-mainspring-for-12s-seth-thomas-pocket-watch-no-2542","provider":"Vintage Time Parts","version":"1.0","type":"link"}