Removing from old storage we found pair of early German tubes.

Siemens Z2c in PAIR

Cartons show ages.

Both base paper label partially gone.  

Nr. 64795 Its glass upper a bit more shade but pins are cleaner comparing to the other.

Older series Nr. 57392 shows copper looking pins.

For very high level tectifying project.

All in Spot welded anodes. Two solid getter atop.

Well built High Quality !

Details by All Enlarged images.

Another electube Rare find.