China 1992 Inventions and Discoveries of China Series - First Seismograph 22 grams Silver Coin - NGC PF-69 Ultra Cameo

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Part of Inventions and Discoveries Series. Commemorates the first seismograph (earthquake detector). This gem proof coin is minted from 22 grams of pure (900 fine) silver. Rare opportunity to acquire this coin, which is usually available only as part of an expensive set.
MetalSpec: Silver
WtSpec: 22 grams
Purity: 0.9
Mintage: 15,000
Denomination: 5 Yuan
Grade: NGC PF-69 Ultra Cameo
DaySign: 30
OzSize: 0.6429
GmSize: 19.997
Year: 1992
MetalID: 2