Symbol 5065 from IEC 60417 - Title/Meaning: Horizontal picture amplitude Function/description: To identify the control for the horizontal picture amplitude (picture width), for example of a television receiver, a monitor.
Additional information: 
Published in: First edition, 1973
Own work using: iso.org/obp/graphics/grs/f16164f3-2754-452f-b7e9-da44ea3f14ba 200.png
Vectorization:  Mrmw