  We determine cosmological and evolutionary parameters from the 3CR K-band
Hubble diagram and K-band number counts, assuming that the galaxies in question
undergo pure luminosity evolution. Separately the two data sets are highly
degenerate with respect to choice of cosmological and evolutionary parameters,
but in combination the degeneracy is resolved. Of models which are either flat
or have $\Omega_\Lambda=0$, the preferred ones are close to the canonical case
$\Omega_\CdM=1$, $\Omega_\Lambda=0$, with luminosity evolution amounting to one
magnitude brighter at z=1.
