Original TELEFUNKEN RENS 1284 used tube
from December 1931
Vacuum Pentode RF/IF-Stage
H4128D / SP4 / RENS1284 / MS/Pen / NS4 / A4AM / P4150 / RS4346 / TE46 / NSS43 / WE23 / W446 / HP4100 / 5-446 / S435N / 4A9_Ultron
the tube is not much used, very high emission:
Ia = 3,8mA
where 100% for the new tube is 3mA
the tube has Europe 5-Pin (O5A, B5) base, top contact screw type
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