That view is a cross section of the overall wall construction.
You may be able to find the aluminum studs with a stud-finder. I just tried with my cheap studfinder, it shows something floor to ceiling about 48" on center with that 4 panel window centered between. But the return is weak. Would need more investigation to be sure this would support your Tv. Don't know who would still have drawings for Georgie Boy..
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel
Our Pug "Lily" & "George" the Newfoundland