Symbol 5107B from IEC 60417 - Title/Meaning: Normal run; normal speed Function/description: Alternative graphical representation. Same meaning as 5107A.
Additional information: 
Published in: Supplement K, 1991;Supplement J, 1990;First edition, 1973
Own work using: iso.org/obp/graphics/grs/2d72abf2-1a55-4b05-8879-e4b09c72c07e 200.png
Vectorization:  Mrmw