We have been recently successful in isolating the fcc polymorph of the key hyperexpanded fulleride Cs3C60 - this phase can be driven to a bulk suprconducting state without symmetry change by the application of pressure. Its Tc passes through a maximum of 34 K at ca. 6 kbar. With this proposal, we want to address the nature of the electronic states of the fcc Cs3C60 phase at ambient pressure and search for the onset of long range antiferromagntic order by using the muSR technique in its ZF/LF/TF variants.