Korean 3A3's

[Charlie]

I just got a dozen NOS International Servicemaster 3A3C's for 99 cents (8 bucks with shipping). I've used this brand before, but dont really recall where they were made. These, however, were made in Korea. Come to think of it, I don't recall ever seeing any other tubes made in Korea.

Was wondering if anyone here has used Korean made tubes, and if so, do you feel like they performed just as well as tubes from other countries?

I figured for 99 cents, what the heck!