||Blank post card. Manufacturer's text: Numbering currency. Undoubtedly the most wonderful machine at the Bureau of Engraving is a remarkable press invented and constructed by Americans, which prints the red series numbers found at either end of every piece of our paper money. This machine, which is the only one of the kind in the world, sets its own type and automatically prints the numbers in succession from 1 to 1,000,000,000. Raphael Tuck & Sons' Post Card Series "U.S. Bureau of Engraving and Printing" Photochromed in Saxony. Handwritten 12 in top left.