The EF80 internally screened pentode was a workhorse of the VHF TV receiver and was introduced in 1950. The Z152 is the same valve but made by another manufacturer.
The internal screen obscures the electrodes.
The thin glass tube envelope is 20 mm diameter and excluding the B9A base pins, is 58 mm tall.
References: Data-sheet & 1040 Type Z152 was first introduced in 1950.