hey cointalk, i inherited this coin from my grandpa, who set it aside with various pocket change for the past 40+years. I heard 1966 is a key for the series. It's VF to XF ish, lookin' for what value it may carry.
Catalog of World coins list it as $1 in VF, $2 in XF. Mintage 7,000,000. Next lowest mintage is the 1975 at 10,000,000.
I can't remember the member's name, but if you do a search for Korean coins either here or on Google there's a website put together from a guy that posts here that's really informative...ah nevermind...here's the link: http://www.dokdo-research.com/koreancoins.html