This is the box only (no tube). The box was for the RCA UX-216-B Rectifier Tube.
The box has a torn flap and an oil stain (see the pictures).

The UX-216-A tube was developed by GE in 1924. It was later renamed to the UX-216-B to prevent confusion with the Western Electric 216A. It used a tungsten filament.
The type 81 rectifier is often used as a substitute as the UX-216 is extremly rare (and thus expensive if you can even find one).
The type 81 has similar characteristics, but has a coated filament instead.

How To Order:

Purchasing the our items is easy.
Just send us an email indicating the tube you want.
We will let you know the total price including shipping and handling.

Shipping and Handling Information

Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.