Brazil
Republic gold 20000 Reis 1914, KM497, Russo-733, MS63 NGC. Fully struck and highly lustrous with limited instances of abrasive contact atop the surfaces. An extremely scarce date that was missing from the Eliasberg collection, and hasn't been offered publicly in many years. The finer of two examples certified by NGC, and surely one of the finest extant.
Estimate: 3000-4000 USD