Frequency range: 0.5 to 1.5 MHz and 4.5 to 22 MHz but there is no visible band selector switch
Comment. Little information is available on this device. It is an omnidirectional antenna system which can support up to 80 receivers without mutual interference. It is designated as an AM/FM amplifier.and is designed to reject the ship's transmission frequencies.
Manufacturer: Marconi Marine International.
Contributors and Credits1) https://www.vintage-radio.net/forum/showpost.php?p=771354&postcount=50
Jan 18/23