EKS/1 godišnjak was a special issue of Yugoslavian/Serbian comic magazine published by Dečje Novine.
EKS/1 godišnjak was also known as EKS almanah specijal HIT and included a wide variety of comics in every issue. Expect this, first 8 issues of magazine Horor and first 24 issues of magazine YU strip had numerations /1. "The Phantom" appeared only in issue #36 or annual 265/1.
In addition, the Phantom appeared on the cover of EKS Almanah 169/1.