No person except a natural-born citizen, or a citizen of the United States at the time of the adoption of this Constitution, shall be eligible to the office of president.... There is no comma after "States" and before "at" in the copy on my wall. Strange, the copy I have does have a comma after "States", although I don't think it changes the meaning or intent:
No person except a natural-born citizen, or a citizen of the United States, at the time of the adoption of this Constitution, shall be eligible to the office of president....
Yes, it's strange! Don't know why this fancy framed Constitution I have is different, but I think it's more accurate as to intent.