Symbol 5526-1 from IEC 60417 - Title/Meaning: Colour video input, analogue Function/description: To identify controls and connecting terminals specifically meant for analogue colour video input.
Additional information: 
Published in: Supplement O, 1996,3C/293/DIS
Own work using: iso.org/obp/graphics/grs/28defa35-358f-4771-9310-102b19e0d0c3 200.png
Vectorization:  Mrmw