China
People's Republic gold Error Proof "Sino-Swiss Friendship" Panda 1 Ounce Medal 1988 PR69 Ultra Cameo NGC, KMX-MB21. Pan-90a. Mintage: 550. An extremely interesting error as a result of having been struck with dies intended for platinum coins. Initially distributed at the Basel International Coin Week event.
Estimate: 3000-4000 USD