BONN-ELSA. $ω$ photoproduction off hydrogen and deuterium has been studied with the tagged photon beam of the ELSA accelerator in Bonn for photon energies up to 2.0 GeV. The $ω$ meson has been identified via the $ω\toπ^0γ\toγγγ$ decay mode, using the combined setup of the Crystal Barrel/TAPS detector systems. Both inclusive and exclusive analyses have been carried out. Differential and total cross-sections have been derived for $ω$ mesons produced off free protons and off protons and neutrons bound in deuterium. The cross-section for the production off the bound neutron is found to be a factor of $≈$ 1.3 larger than the one off the bound proton in the incident beam energy region 1.2 GeV