Going back to the story, I like Captain Marvel’s can-do spirit in building a time machine. He tells Dr. Vanna, “. . . we’re going to work out a way to travel back in time, and find out what really happened in 1780.” That is followed by a panel with sound effects, BANG, POW, BANG. They must have used big hammers to build that time machine. When Captain Marvel travels to 1780 he arrives in France, meeting Ben Franklin, who looks just like his picture on the money.
Art credit goes to C.C. Beck. From Whiz Comics #26, January, 1942: