Symbol 5108A from IEC 60417 - Title/Meaning: Fast run; fast speed Function/description: To identify the switch or switch position by which a faster than normal run (e.g. of tape) is started in the indicated direction.
Additional information: 
In the orientation shown, the symbol means ""fast run, forward"". If shown reversed, the symbol means ""fast run, backward"" or ""fast rewind""
Published in: Supplement K, 1991;Supplement J, 1990;First edition, 1973
Own work using: iso.org/obp/graphics/grs/a15b56e5-405a-4d81-9936-0177f6f0c7fe 200.png
Vectorization:  Mrmw