{"product_id":"excelsior-2818-mainspring-for-travel-car-clocks-10-x-4-x-48","title":"Excelsior #2818 Mainspring for Travel \u0026 Car Clocks - 10 x 4 x 48","description":"\u003cp\u003e\u003cstrong\u003eExcelsior\u003c\/strong\u003e No. 2818 Mainspring for Travel \u0026amp; Car Clocks the 1920's and beyond, steel.  Believe this is for an 8-Day travel clock but I don't know that for certain. Measures a Dennison 10 x 2 x 48 - see images for further information. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find parts so I usually have whatever you might need and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item. \u003cbr\u003e\u003c\/p\u003e","brand":"Excelsior","offers":[{"title":"Default Title","offer_id":48691760890164,"sku":"CMS-EXC2818S-07","price":7.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-07-1620.27.57.jpg?v=1752723044","url":"https:\/\/www.vintagetimeparts.com\/products\/excelsior-2818-mainspring-for-travel-car-clocks-10-x-4-x-48","provider":"Vintage Time Parts","version":"1.0","type":"link"}