Founded in 1968 by Paul Panhuysen, Remko Scha and Jan van Riet.

Members:

Paul Panhuysen (1968–2015)

Remko Scha (1968–1982)

Jan van Riet (1968–present)

Hans Schuurman (1969–1980)

Leon van Noorden (1971–present)

Mario van Horrik (1982–present)