Here's what I dug up quite a while ago when I also noticed a big difference in the signatures on some of my notes
Until approx 1968 the signature on the notes were applied by typography as a separate step in the printing process. These signatures were heavier with considerable variation in the amount of ink applied, and they wandered around bit in alignment. After 1968 the signatures were engraved right onto the plates resulting is a finer signature with no wandering.
I believe the change was shown to be at the end of the Y/S prefix.
Cheers, Bill
Until approx 1968 the signature on the notes were applied by typography as a separate step in the printing process. These signatures were heavier with considerable variation in the amount of ink applied, and they wandered around bit in alignment. After 1968 the signatures were engraved right onto the plates resulting is a finer signature with no wandering.
I believe the change was shown to be at the end of the Y/S prefix.
Cheers, Bill
Edited by Hounddog Bill
03/01/2018 12:07 pm
03/01/2018 12:07 pm






















