We have as yet no details on this RF power valve, it is not listed in the RCA transmitting tube book of 1962.
The dimensions suggest an anode dissipation of 250-500 Watts. The co-axial structure suggests operation up to 500 MHz.
The picture shows the valve standing on its anode. The space between the anode and the outer ring is filled with looped ribbon to provide a large surface area for the forced air cooling. The other connection rings indicate either an indirectly heated triode or a directly heated tetrode.
The co-axial envelope is 52 mm in diameter and, including the base rings is 60 mm tall.
Updated March 11, 2013.