Music Distributor GmbH

German record company, commonly denoted with an brand with a small GmbH below the Music Distributor wording.
Usually the address is mentioned and should be denoted at the release notes, as it has changed several times, see below. Anybody know the exact dates, please update here.
The company started as distributor without own labels. In the Musikmarkt Branchenhandbuch 1983 are mentioned no own labels.
In between the company obviously acquired some labels, cause the Musikmarkt Branchenhandbuch 1992 mention as own labels:
Joschua Music and Sonata
Other labels that were distributed are:
Cezame
While the Musikmarkt Branchenhandbuch mentioned no branches outside , there were obviously branches in Belgium and the Netherlands. Likely Music Distributor is one of the versions, but lacked a clear company suffix at the moment.