A previous post asking questions about Scott 1608 mis-registrations had me looking at other period stamps from that era that had notable color shifts.
Here's a sample of five (5) Scott 1519 Coil Stamps where the red stripes in the flag are literally all over the place, and the red color shift is also noticeable in the centering of the red words "UNITED STATES" around the blue "10c":

Just another interesting study in color mis-registrations from the early 1970's.