The drawn winged diagram is not from a WTS publication , it was made by someone taking notes, referring to Satan as an winged angel.
LOL,,, It is in the WTBTS video, everything in the video is carefully prepared for display, subtle images have a purpose and ARE there for a Reason. Just like ALL advertising, everything is there for a reason!. Most images are for subliminal purposes.
At this level they do not make errors easily!.