Among the "condition rarities" in South Korean numismatics most certainly must be those "bronze" (88%Cu / 12%Zn) Five Won and 10 Won coins with dates of 1966~1969 that NGC or PCGS will assign a grade of MS-65 —or higher, if that's even possible. The reason for this grading ceiling must be because there are almost none that exist with at least a few scattered light marks on their surfaces. They were all probably banged around somewhat in mint bags. Also, there is the "brown spot" scourge that these copper-based coins have a hard time avoiding. To get that 65 grade, these coins would have to have only "minimal marks" on the devices, and only a "few scattered marks" in the fields and all to a lesser degree than coins graded at 64. Mint State 65 is the grade that collectors consider the "choice uncirculated" grades to begin; and from here up to 70, the marks should only get fewer and fewer, and the luster and eye appeal should only get better and better. To find one of these Bronze coins in 65 or higher would be a real treat indeed!
