Symbol 2011 from ISO 7000 - Title/Meaning: Capitals lock Function/description: To identify the control to select the state in which only capital forms of letters are entered.
Additional information: 
On certain national keyboards for certain keys, this function is equivalent to level 2 lock. The meaning of this graphical symbol depends upon its orientation.
Own work using: iso.org/obp/graphics/grs/6472d539-29ca-4470-b6d4-1bf570dce6ec 200.png
Vectorization:  Mrmw