In what year was the album “666” released by Kat?

In what year was the album “666” released by Kat?: The album “666” was released in 1986 by Kat, featuring 10 tracks.
What is the most successful song from the album “666” by Kat?: “Wyrocznia” is the biggest hit from the album “666” by Kat.

Other artists of Heavy metal music