A favorite of small case radio collectors, a 1938 Zenith model 5S228. Commonly called a "Cube Radio". Zenith made a bunch of models in the shape of a square cube. The 5S228 is not a cube models but is considered part of the same family because of its small size. It is really a small tombstone.
A favorite of small case radio collectors, a 1938 Zenith model 5R226. Commonly called a "Child's Console". Zenith marketed this radio to be purchased along with a full sized console, Dad gets a new radio so should his son. The 5R226 is not a cube radio or a small tombstone. It looks like a small console radio. It is unique and highly sought after by collectors.
A favorite of small case radio collectors, a 1938 Zenith model 5S218. Commonly called a "Cube Radio". Zenith made a bunch of models in the shape of a square cube. The 5S218 is one of the smallest of the cube models.