China 2000 Millennium Bimetal Gold & Silver Proof Coin (Y2K) - NGC PF-69 Ultra Cameo
This interesting issue features an architectural theme combined with symbols of home, water, clouds, etc. Contains center of 1/2 oz. .999 fine gold surrounded by ring of 1/20 oz. 999 fine silver. Not listed in the Standard Catalog of World Coins, and presumably rare.