There are 2 total different projects called D-Mark:
1. A short time (1981/1982) existened Punkband from northern germany (Kiel). They released several tapes and 1 critical highly praised EP: The name of the EP is "Geld, Sex, Macht, Gewalt". Their style was nihilistic and radical in lyrics and sound.
They made very short songs like noise-explosions and then again long improvised ones.
The EP can be heard nowadays on some samplers, the best known is called "Kein Kiel".
2. A Trance-Project called D-Mark.