China
Taiwan. Republic Sun Yat-sen gold "Birth Centennial" 1000 and 2000 Yuan Certified Pair, 1) Year 54 (1965) 1000 Yuan - MS65 NGC, KM541, Fr-162) Year 54 (1965) 2000 Yuan - MS63 NGC, KM542, Fr-15The 1000 yuan is free of tone, while the 2000 yuan shows areas of copper-russet tone over both sides.
Estimate: 2000-3000 USD