{"product_id":"grand-seiko-spring-drive-sbga427","title":"Spring Drive SBGA427","description":"The 39mm stainless steel case houses the Spring Drive 9R65 Caliber, which is designed, adjusted, and assembled by hand by acclaimed craftsmen and women at the Shinshu Watch Studio in Japan. Spring Drive, recognized as one of the great innovations in modern watchmaking, is a spring-driven movement with a state-of the-art electro-magnetic regulator that functions without an external power source. Its sole power source is a mainspring, which drives a series of gears like a traditional mechanical watch, and delivers precision of one second a day, a rate unprecedented for a watch powered by a mainspring.","brand":"Grand Seiko","offers":[{"title":"WGSKG00027","offer_id":47045165285532,"sku":"WGSKG00027","price":5800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/4487\/8492\/files\/37077500_C00751313_747059_WGSKG00027_1.jpg?v=1781217221","url":"https:\/\/zadok.com\/products\/grand-seiko-spring-drive-sbga427","provider":"Zadok Jewelry","version":"1.0","type":"link"}