Arm badge, Submarine Detector

Arm badge, Submarine Detector

Below is when the badge was used for diffferent ranks:
Submarine Detector Operater (1930-1937)
Submarine Detector (1937-1947).

Object Details

ID: UNI4868
Collection: Uniforms
Type: Arm badge
Display location: Not on display
Creator: Unknown
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London
Measurements: 95 mm x 75 mm