Symbol 5144 from IEC 60417 - Title/Meaning: Range rings brilliance Function/description: To indicate the maximum position of the range rings brilliance control.
Additional information: 
Published in: Supplement A, 1974
Own work using: iso.org/obp/graphics/grs/4d887eb9-0572-4cd1-99af-61a928701fc9 200.png
Vectorization:  Mrmw