This tube is listed on page 32 of L'ABCDes Lampes de TSF as type number B2049T. Apart from this, no other source information shows the B2049T. Characteristics appear to be the same.
Dimensioni (LxAxP) incl.pins/tip
50 x 139 x 34 mm / 1.97 x 5.47 x 1.34 inch
Bibliografia
L'ABCDaire des lampes de TSF des jeunes années p. 32
Babani, International Radio Tube Encyclopaedia p. 54 & 55
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
