The Only Good Drummer Is A Dead Drummer (tape, Ruziek 05, 1987)
Things may not get obscurer than this. What you see here is the entire cover, but apparentely (according De Nederlandse Cassette Catalogus) it is released by Ruziek, a label from Utrecht, run by J.P. Kuil, who was the main man behind Vacuum. The label partly released punk and partly experimental music. This tape, according to the Catalogus, credited to El Ctrosan, belongs to the latter category. I guess its not surprise, when I say, 'and that's all I know'.