Brazil
Republic gold 10000 Reis 1921 MS64 NGC, Rio de Janeiro mint, KM496, Russo-709. Choice Uncirculated with vibrant luster and a very well-defined strike over essentially unmarked surfaces. Currently tied with a single other example as the finest graded for the date by NGC. Impressive and rare in this select quality, and to elicit sustained interest.
Estimate: 5000-7000 USD