Treasure sword is still shiny after 2700 years of Viet Vuong Cau Tien
The Sword of the Sword made from copper and tin retains its sharpness and shine after thousands of years of existence.The sword is 1500 years old in the Japanese tomb
Archaeologists find two rare swords in the 1,500-year-old tomb in the underground in southern Kyushu, Japan.