美金100元背面的歷史

The time show on the clock is 4:10 not 2:22. There is no explanation of why the clock is set to this officially. You can check it out from the US Bureau of Engraving and Printing. This is the official department of "printing" money physically. You question is listed on the following web page:http://www.moneyfactory.gov/small100denom.html