The 7060 has the basic design of the 6AU8 but a specially designed heater to work with battery supplies from 12 to 15 Volts and centred at 13.2 Volts.
RCA state: for use in mobile communications equipment operating from 6-cell lead-acid storage battery systems. The pentode unit is useful in classC amplifier and frequency-multiplier applications at frequencies up to 40 MHz. The triode unit is useful as a reactance modulator for generating FM.
The 6AU8 is similar but aimed at a different market.
The RCA logo. The pentode and triode sections are at right angles to one another.
The triode section with screen behind.
The pentode section is in fact made as a beam tetrode.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 48 mm tall.
Reference: Datasheet. Type 7060 was first introduced in 1958.