Thank you for viewing from among many items! 1970 Expo Necklace Chain Length: Approximately 52cm Top Diameter: 1.8mm Material: Unknown. There are dullness and scratches. This item has been stored for a long time at my parents' house. It was kept in my mother's dresser. Please check the photos for reference. *Photographed in the rain and under electric lights. There are no smokers or pets. I have inspected and measured the item myself. This is a "long-term storage item." If you are concerned about any potential oversight of aging or deterioration, please refrain from purchasing. Thank you for your understanding of used items. Please consider purchasing. Thank you for viewing until the end,