Symbol 5062 from IEC 60417 - Title/Meaning: Vertical synchronization Function/description: To identify the vertical synchronization control, for example of a television receiver, a monitor.
Additional information: 
Published in: First edition, 1973
Own work using: iso.org/obp/graphics/grs/55f3e6f4-16e8-49b9-8900-e2742b207d66 200.png
Vectorization:  Mrmw