"1957-04-26Z"^^ . . . "1957Z"^^ . "Adamant Co., Ltd. (\u30A2\u30C0\u30DE\u30F3\u30C9\u682A\u5F0F\u4F1A\u793E, Adamant Kabushiki-gaisha) is a component manufacturing company based in Tokyo, Japan. Its name is from the word adamant, which was derived from the Greek word adamas meaning \"diamond\". At of its founding, Adamant's main products were watch jewels that were made of a hard material.In 1957, Adamant separated from Namiki Precision Jewel Co., Ltd."@en . "Adamant Co., Ltd."@en .