Symbol 6082 from IEC 60417 - Title/Meaning: Superselect 
Function/description: To identify the control to invoke a group or a special keyboard operating mode by typing a character or a series of characters in conjunction with this function.
Own work using: iso.org/obp/graphics/grs/170431e3-e0b4-45b5-b6ad-8ed8f39bdaef 200.png
Vectorization:  Mrmw