China
People's Republic platinum Panda Proof 50 Yuan 1990 PR70 Ultra Cameo NGC, KM279. Mintage: 2,500. The only 1/2 ounce platinum Panda thus far produced and given its unique design, highly sought by set collectors. Rarely available at this ultimate grade with only 6 examples graded PR70 by NGC.
Estimate: 1500-2000 USD