South Korea 1 Won 1966

Very Fine, the rose is very worn.

I remember when I was in South Korea (2002/3), I would occasionally get the 10, 50 and 100 won coins of this old series in change (Used 1966 to 1982), but never 5 or 1 won coins.

Even in 1966, its buying power was maybe 1 or 2 cents. It is an interesting coin, but would only be worth about 10 cents and a "starter coin".

The design shows Pulguksa an ancient temple from the Shilla era (600AD) at the World Heritage site of Kyongju near Daegu in the southern part of the country. I have been there and its beautiful, especially around cherry blossom time (Early April).
The Hangeul translates to "il Won" and Han Guk Dae Han (1 won - Republic of Korea) Hanguk = Korea, Dae Han (Republic or Great)

The other side shows the Mugunghwa flower or Rose of Sharon, this is the national flower of South Korea, like the 5 yen of Japan,
the 1 won coins of South Korea are seen as luckly talismans by some Korean people.

Are you talking about this coin?
I was in Korea and saw a keychain there from local merchants in which a 1 won coin was placed

Perhaps MS-61/2 with NGC. Price would be below $100 USD.

I can't actually tell what grade this coin is, even with these nice photos.

I address all South Korean coins in my new book on the subject. The entire history and data behind these One-Won coins is covered in the book.
There is a somewhat common clashed dies error with the 1966 One-Won, btw. So when you find 1966 One-Won coins, check the obverse (flower side) and look closely for a clash impression.

Nice coin! Thanks for highlighting South Korean coins!