Here's an error coin that the Korean press did an article about in 1974. This is what you call an "uncentered broadstrike," correct? I read that coins like this are struck outside of the collar. So, the coin gets struck on "top" of the collar, and that's what makes this effect?
That is pretty cool.S Korea error coins are quite rare. In fact this is the first major error coin from Korea that I've seen!
Yep. The Korean Mint is rather proud of the fact that these don't slip out too often. You can see one of these off-center strike with collar scar errors, here: https://blog.naver.com/duck1044/221229818682 1977 obverse Doubled Die 100-Won: https://blog.naver.com/duck1044/70019982052 1982 reverse DD also: https://blog.naver.com/duck1044/70018210775