  Within the meson exchange model we study $\omega$ meson photoproduction at
energies above the s channel resonance region. Different model prescriptions
for the $\omega{NN}$ vertex function are investigated imposing gauge invariance
as well as crossing symmetry. The calculations reproduce the energy dependence
of the differential $\omega$ photoproduction cross sections at moderate $|u|$
for $E_\gamma{\le}4.7$ GeV, which previously were discussed as an indication of
the hard interaction between the photon and quarks of the nucleon.
