Quote:
it is almost like the front side wasn't centered properly to the back side when it was printed.
Unlike coins, the two sides of a banknote are printed separately. Multiple print runs are actually used for each sheet of notes. First the background colours are applied (on old-style notes like the OP's, this process doesn't happen as there are no background colours). Then the green-ink back side is done, then allowed to dry for three days, then the black-ink front side, some more time in the dryer, then finally a separate print run for the seals and serial numbers, and a final drying before cutting into individual notes. So it doesn't even all happen on the same day.
This does create room for all kinds of mis-print errors to occur, with the opportunity for banknote sheets to get fed into the printers wrongly/differently each time.
Compare that to coins, where it's a fraction of a second in the press, one hit* and it's done, complete.
* - yes, I know, proof coins are hit twice, and slower. We're talking modern mass-production circulation items here.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis