The CV1944 is a triode hexode frequency changer. The prototype was the 6K8G and the CV1944 is identical.
On this exhibit is etched the designation 6K8GY indicating a base cap with a lower AC loss than Bakelite.
The solid outer screening cylinder. Inside the screening shell can be seen the dark side screens. The bright plate in the foreground is the triode anode. The hexode anode is the same size on the other side of the valve.
Looking at the lower components the cathode tube is set to one side. The triode control grid and anode are towards the bottom of the image. The hexode grids are towards the top of the picture. The triode grid and the hexode first grid are the same winding. See the 6K8 for the construction diagram.
The top mica with the triode on the left.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 97 mm tall.
Reference: Data-sheet. Type CV1944 was first introduced in 1938.