Westinghouse UV-201 (early)
DC Det/Amp Triode
1922

This early Westinghouse version of the UV-201 was basically a redesigned WR-21 in a shaw UV base. The filament rating, 4 volts at .8 amps, was not compatible with the normal UV-201. About 3200 were made but it's not clear if these were actually sold to the public.