KOREA. 20 Mun Pattern, Year 495 (1886). NGC MS-63 BN.KM-Pn12; K&C-25.1; Bank of Korea-376; Da Guang Se-13-11. Struck in copper. Tai Guk Design, Test Coin for the first modern machine struck coinage series of Korea. EXTREMELY RARE. Sharply struck with attractive brown surfaces with underlying luster.NGC MS-63 BN.