What I find amazing, the earlier notes printed from 1890 on to about 1970, including U.S. currency is how do they get the design so perfect? What I mean is, everything is perfectly balanced and symmetrical, baorders, numbers, lettering, line etching all perfect and perfectly spaced. Remember these notes were designed and hand engraved before computers were around, so they didn't have a CAD program or drawing/paint program to design the notes or to have the computer lay everything out perfectly before starting the engraving. Also you can't really make any mistakes while engraving a master printing plate for a banknote, again amazing that there are no errors with all the intricate engraving, especially on the portraits and fancy boarders.