The 250 watt special is a triode may be an experimental tube and is similar to a late production Westinghouse VT-22. The filament is only one run of wire and not two as in the 204A/VT-22. An extra wire comes out where the anode wire emerges. Extra long wires were used as operation with a socket wasn't intended. A second tube of this construction is known.
Length = 11.50" Diameter = 4.06"
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