The manufacture of thermionic (radio) valves part 3

The manufacture of thermionic (radio) valves part 2

The manufacture of thermionic (radio) valves part 1

This is a one valve [tube] radio that believe it or not I constructed 48 years ago. It remained lost but was discovered again during a recent house move. The valve used is a battery R.F. pentode dating from around 1948 on a B7G base. The type number is DF91 or the American equivalent, the 1T4....

This little four-valve radio has not yet been identified. I'm hoping that somebody can identify it for me or help me to do so. It measures 6"deep, 7 high and 10 wide. The only labels it has on the front is the company name of 'Freed Eisemann' and on the rear of the internal metal chassis is a...