It's not a featherweight. Featherweights weight about 12 pounds and have a little shelf to the left of the needle that is hinged and folds up. The weight makes it easily portable.
Not sure which model you have exactly, but the condition is excellent and it should sew very, very well. I love those old machines, but they do weigh a lot. Machines such as yours are collectible also; they just do not typically have as much monetary value as featherweights (which are prized because of their portability).
Oh, and a featherweight would not be in a wooden base like that. They stand on their own.