RBZ

is a short wave receiver used in WWII by the American Navy and their paratroupers to receive orders.
It is a 5-tube- Superhet, Mode AM.
Batteries and radio are built in two equal Plastic housings, carried together in a canvas pouch.
A very rare Skull Cap

Skull cap (Click picture to enlarge)

contained the headset. The helmet was the antenna.
My radio is a RBZ (no RBZ Special).

Frequency range:

2 .. 5.8 MHz

( RBZ Special: 5 .. 13 MHz )

Modulation:

AM

Powered by batteries:

67.5 V and 1.5 V

Controls:

2 Knobs:

on/off/loudness

Frequency

Year of issue:

1944 ?