Original MAZDA L2/DD

battery operated double diode-triode 
Ekco B85 battery radio from 1934

Vf=2V, If=0,1A 
 the tube seems to be unused or slightly used, high emission:
tested in conditions: f=2V Ua=150V  Ug1=-3,8V

 Ia = 8mA

where 100% for the new tube is about 4mA

the tube has B5 base and top contact
you will get the tube you can see at the pictures
I always send the tubes by priority registered mail with tracking number within hours after receiving payment

                                                                                                                Santic [feat. Vera Hall] – Trouble So Hard