AT26 transmitting triode

See the text below for dimensions. This valve has a B4 base.

Four specimens in order: Ediswan s/n 900 (110x50mm); s/n 6776 (97x53mm); s/n 8234 (108x50mm); Cossor s/n 10987 (101x53mm)

Note the absence of the top pip on the Cossor valve.