  The possible physical relation between the closely projected open clusters
NGC 1912 (M 38) and NGC 1907 is investigated. Previous studies suggested a
physical pair based on similar distances, and the present study explores in
more detail the possible interaction. Spatial velocities are derived from
available radial velocities and proper motions, and the past orbital motions of
the clusters are retrieved in a Galactic potential model. Detailed N-body
simulations of their approach suggest that the clusters were born in different
regions of the Galaxy and presently experience a fly-by.
