Micromold resistors

[Tim Tress]

Those are the Micamold insulated carbon resistors; I have only seen them in 1930s radios. The wire-wound types are a little bit wider and the case has a different design; they were made in two different sizes. Zenith was probably the biggest user of them, and they turn up in other brands as well; Midwest, Emerson, and Stewart-Warner to name a few.