This is definitely a machine you do *not* want to lug to classes! The ones in wooden carriers like this weigh a ton. Plus, you can never be sure that the old hinges are going to hold, so even if you do carry the machine around in its case, you need to strap the case closed first.
The old Singer model favored by quilters for its light weight is the model 221 featherweight. Second choice is model 301, which is considerably heavier. Both of these have a hinged table piece to the left of the needle that can be folded up. Both came in portable models (machine does not have a wooden base), and that is what people take to class.
The wooden base type machines can be collectible; however, they are really not considered portable because of their weight.