{"product_id":"paulson-mainspring-no-d1310-for-eta-761-840-1029-1057-1201-1215-steel","title":"Paulson Mainspring No. D1310 for ETA 761, 840, 1029, 1057, 1201, 1215 - Steel","description":"\u003cp\u003e\u003cstrong\u003ePaulson\u003c\/strong\u003e Mainspring No. D1310 for \u003cstrong\u003eETA\u003c\/strong\u003e caliber 761, 840, 1029, 1057, 1201, 1215 movements and perhaps others, steel, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Paulson","offers":[{"title":"Default Title","offer_id":49134962770228,"sku":"PMS-PAULD1310S-05","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-05-2208.17.10.jpg?v=1779463237","url":"https:\/\/www.vintagetimeparts.com\/products\/paulson-mainspring-no-d1310-for-eta-761-840-1029-1057-1201-1215-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}