Power Tetrode

Coiler Types,

I found a batch of metal/ceramic power tetrodes in the recycle bin.  They
are marked "ITT 1182".  I crossed the part number to "4600A", but aside
from that, I can't find any info on them.  They are about the size of a
coffee cup with concentric rings instead of pins & a big ring of cooling
fins.  Anybody have a clue?  Any possible use for our hobby?