The 7462 is a ceramic-metal planar triode for RF amplification. The pins are designed for direct insertion into a printed circuit board and to be soldered in. The design frequency range of the 7462 is from low to UHF.
No specific application is given but for a 1960 design, in the heart of the Cold War, it is possible that this transistor sized valve would find applications in radio equipment that was able to withstand an EM pulse.
The heater end of the valve with GE logo.
The two heater connections are at the top. Then top to bottom are connections for cathode, grid and anode.
The thin ceramic tube envelope is 5 mm in diameter, and is 12 mm tall.
Reference: Data-sheet. Type 7462 was first introduced in 1960.