The Meck Photofact for model XQ-776 at
https://www.radiomuseum.org/r/meck_xq_776.html
I can only view the photofact initial page as a guest since I am not a member.
Does anyone have a copy of the Photofact which they can scan a picture of the Channel Indicator Escutcheon. It looks like the numbers go counterclockwise from 2-13. The Meck XQ776 doesn't seem to have the Notes symbol at the top?
The 2nd picture is my guess of your probable channel layout?