China
Yunnan. Gold 10 Dollars ND (1919) AU Details (Surface Hairlines) NGC, L&M-1057, Kann-1524, KM-Y482. Obv. 3/4 facing bust of Tang Chi-yao. Rev. Crossed flags with numeral "1" below the tassels. Sharply struck, with noticeable remaining luster and greenish-gold patina. The "surface hairlines," mentioned on the holder, are so faint, that most would hardly notice them.
Estimate: 2000-2500 USD