Symbol 5066 from IEC 60417 - Title/Meaning: Vertical picture amplitude Function/description: To identify the control for the vertical picture amplitude (picture height), for example of a television receiver, a monitor.
Additional information: 
Published in: First edition, 1973
Own work using: iso.org/obp/graphics/grs/c2e8a671-71fe-4c49-93f2-af9025616f89 200.png
Vectorization:  Mrmw