Silver Cup Showa 58 (1983) - Tokyo Governor - Long Service Commemoration The bottom says "Pure Silver". There is also a Hinomaru (Japanese flag) and "1000". Weight: Approximately 100g Height: 3.6cm Diameter: 10.5cm It was gleaming when I got it from my parents' house a few years ago, but after discarding the damaged box and displaying it, it has become this color.