Singer Spartan usually comes with black plastic bottom that is usually broken. a cover snaps onto the sides for a case.
neither of my Spartans had a good base. Spartan is really a 192 model Singer, so you can find manuals by that. it is a
3/4 size machine and a good stitcher, heavy. can't remember which bobbin it takes, but manual will tell you. manual
should be free download somewhere.