The 62-VP is a variable μ RF pentode for use as an RF or IF amplifier.
In the literature it states that although pins 3, 4 and 7 are internally connected together, it is recommended that the external cathode connection be made to pin 7 as this point offers the lowest connection inductance.
The all covering screen.
The locating pip moulded into the glass is required as the eight pins are equi-spaced around the pin circle on the base.
The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 53 mm tall.
References: Data-sheet & 3002. Type 62-VP was first introduced in 1950. See also1950 adverts.