Hi ... just saw this now ... does seam to be any notification when you get a reply .
The Charlton Catalogue does not mention color variations on BABN 1$ notes .
The CBNs notes starting with A and B - what I have seen - are consistently dark blue .
The BABNs notes starting with E I have are considerable lighter blue .
A side by side comparison reveals a fluctuation within the light blue even .
Nothing that special then ... normal for that time period then 70s/80s I assume .
The minor size difference is then only a feature of the printing company .
Cheers, Douglas