The CV2243 is an RF amplifying pentode for operating in a parallel (fixed voltage) environment. Such a device would be used for radio receivers and VHF television. The operating voltages were normally much lower than the maximums given.
The CV2243 is electrically to the earlier 6F14 that was on the B8A base.
The perforated screen. The copper control grid supports can be seen to have a heat sink fin attached.
Here the strap between both halves of the anode can be seen together with the open suppressor grid and shaped screen grid. The latter passes flat across the cathode.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins and spigot is 48 mm tall.
Reference: Data-sheet. Type CV2243 was first introduced in 1954. See also1954 adverts.