It is definitely a model 19, and fairly complete. It is a right handed plow, meaning it threw the dirt to the right. With the steel beam it would be one of the later plows, as the earlier ones had wooden beams. I don't know if the model 19 came in a left handed version, but some did, and those are harder to find. I have some model 40 plows, both early and late, left and right. I got replacement handles from a flee market vendor that sell handles for gardening tools made in Tennessee. Another good source would be hardware stores in Amish communities, they still use them.
Take care,
Andy