Vietnam
South Vietnam. Republic 50 Dong 1975 MS62 PCGS, KM14. A lustrous example of this very scarce type. The obverse shows an area of patination to the very left side on/near the rim. It is reported that all but a few examples were disposed of as scrap metal.
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 1000-1500 USD