My layout has two plows, neither one correct for my layout's late 1940s era.
The first one is a MTH RK Russell Single Track Plow. The wing was used to clean adjacent track or move the snow far off the right of way. MTH got all the visual points correct on this model, but shortened the plow too much. There needs to be more room around the window and the plow itself needs to be longer. The biggest issue for me is the yellow color which did not come about until the early 50s. Need to paint it gray and see if I can add a rail flanger.
The other plow I own is a MTH RK Jordan Spreader. This model looks more correct as far as its demensions and may be a "heavy duty type A" spreader, ditcher, snow plow. Black is okay, but I need to remove that newer PRR Keystone.