Peru
Republic gold 100 Soles 1951 MS66 NGC, KM231. An exceptional piece; though not a particularly scarce type, it is what can best be described as a "conditional rarity". Of the 78 pieces graded in total by NGC, just 6 have been graded MS66 or higher. When viewed in hand, this piece certainly shows why it belongs in such elite company, with highly lustrous surfaces and the most minimal of handling evidence.
Estimate: 2500-3000 USD