Arm badge, Higher Submarine Detector

Arm badge, Higher Submarine Detector

Below is when the badge was used for different ranks:
Submarine Detector 1st Class (1930-1937)
Higher Submarine Detector (1937-1947)

Object Details

ID: UNI4861
Collection: Uniforms
Type: Arm badge
Display location: Not on display
Creator: Unknown
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London
Measurements: 103 mm x 75 mm