Thanks a ton! Never even knew there was an SHB 105.
One thing I've wondered is why the Show Business labels are exact to Coloursound.
I don't quite understand what you mean by "exact to Coloursound", but Edition Show Business was established and managed by Gunter Greffenius, who was later behind Coloursound, so there's your connection
These LPs seem to be a collaboration between Berry Music Co. (Narholz et. al) and Edition Show Business.