Sterero Cien LP

I have a copy of '30 Anos de Musica Rock' from a Mexican radio station called Stereo Cien.
It has Hamburg recordings and is the same as the proper release on Polydor.
It's has a special hand drawn picture sleeve with to say is weird is an understatement.
It was a celebration of 7 years of the radio station.
I don't have any other information about it apart from i think release date was 1984/6.