On september 6th 1973 Ben Webster was accompanied by the Irv Rochlin Trio, featuring Irv Rocklin at the piano, Henk Haverhoek on double bass and Peter Ypma on drums.
On september 6th 2010 Bob Rigter was accompanied by Rob Agerbeek, Henk Haverhoek en Peter Ypma. Irv Rochlin was wel aanwezig maar speelde niet, hij sprak.