Hmmmmm...pntoons?
Good evening, yarddog. Thanks for sharing your pictures.
You know something interesting? I have the official Army history of the battalion and in it, the army always, 100% of the time, spells pontoons as pontons. They always spell it that way but no body else does. I have never seen it spelled any other way but the U.S. Army Signal Corps seems to think that “ponton” is the right way.
They must use that word a thousand times in the history and never deviate from that spelling.