China
People's Republic silver Proof "Song Qingling" 10 Yuan 1993 PR69 Ultra Cameo NGC, KM538. Mintage: 20,000. A near-perfect example of this commemorative issue that celebrates Song Qingling, the second wife of Sun Yat-sen. Complete with unimpeded flash and frosted design motifs.
Estimate: 2000-2500 USD