The RV2.4P700 is a battery HF pentode. The construction uses a glass foot with external Bakelite mounted pins. The handle allows for front panel valve changes. This format was used by the German military during WWII.
The maker's name on the glass and below the lower mica is a set of screens.
The wires leading from the base are copper and are fixed to tabs on the electrodes.
The control grid lead passes to the top cap. The screening obscures other details.
The base pins, locating key and handle.
The suppressor grid is just visible within the bright anode.
The thin glass tube envelope is 20 mm in diameter and, excluding the base pins, is 57 mm tall.
Reference: Data-sheet. Type RV2.4P700 was first introduced in 1937.