Symbol 5107A from IEC 60417 - Title/Meaning: Normal run; normal speed Function/description: To identify the switch or switch position by means of which a normal run (e.g. of tape) is started in the indicated direction.
Additional information: 
In the orientation shown, the symbol means ""normal run, forward"". If shown reversed, the symbol means ""normal run, backward""
Published in: Supplement K, 1991;Supplement J, 1990;First edition, 1973
Own work using: iso.org/obp/graphics/grs/fde97acb-fa98-4905-9e75-5165704151b4 200.png
Vectorization:  Mrmw