Symbol 5440 from IEC 60417 - Title/Meaning: Programmable timer, general Function/description: To identify the control for a programmable timer, for instance the operating element for a programmed function.
Additional information: 
See also derivatives from this symbol wherein the dot on the rim of the dial represents a preset point in the scale of time, e.g. 5417
Published in: Supplement N, 1995,Supplement K, 1991,3C(Central Office)190
Own work using: iso.org/obp/graphics/grs/49a9be53-a39f-4e4a-8a10-11676869335c 200.png
Vectorization:  Mrmw