The CV1127 is a television line output pentode. The former name was the VT127 and it was based on the Mazda Pen46.
The AM and Crown of the UK Air Ministry.
The closer view of the anode is distorted by the glass.
The top of the valve with the control grid heat sink connected to the copper supports. The anode is connected to the top cap by the copper wire.
The top ceramic support. The screen grid is notched - indicating a wire grid within. The outer support is a plain wire - this connects to the beam plates within the anode space.
The other side of the envelope carries the Raytheon name etched into the glass together with the Type VT127 and the stores code of 10E/231. The valve was made in USA probably in the early years of the 1940s.
The classic envelope is 51 mm in diameter, and excluding the MO base pins is 115 mm tall.