North Korea at the time had three separate coinages: one for use by locals, one for use by foreign visitors from Communist countries, and one for use by foreign visitors from non-communist countries. There is also a fourth version of the coin stamped "specimen" in Korean, presumably for sale to coin collectors abroad. This is the "for local use" version of the coin, and from the condition has clearly seen some local use. The local use coin has the highest mintage, but is the one least frequently seen by collectors (especially in high grade) because taking them out of the country was illegal; most of them never left North Korea.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis