Symbol 5997 from IEC 60417 - Title/Meaning: Message, general Function/description: To indicate that messages are stored, or the control to retrieve the messages.
Additional information: 
Published in: 3C/1529/CDV, 3C/1547/RVC
Own work using: iso.org/obp/graphics/grs/3835740d-1304-4478-b8ea-41edd4d42499 200.png
Vectorization:  Mrmw