This exhibit looks to be an EHT rectifier on an IO base. The plastic construction suggests a replacement for a valve type by an encapsulated series of semi-conductor diodes.
We cannot be sure if the Type designation given is correct as no information can be found.
The makers name.
The other label.
The shape of the envelope and the standard IO base.
The composition envelope is 30 mm in diameter, and excluding the IO base pins is 40 mm tall.
Updated April 23, 2015. base: pin: