they don't appear to be the result of a lack of ink. They look fully-printed.
So does that mean that they are indeed different typesets and therefore either a variety?
I have only seen this happen in the polymer series and that to only in the $50 denomination with the BABN prefixes. Where this happens I have noticed that it mostly affects the A's, sometimes the H's and infrequently the M's
Here are some close up shots of the left side and the right side prefixes from the same note. I have been cataloging this condition in the notes that I seen but as of yet have not seen any pattern emege. I am considering the following possibiities:
If it happens at the same position number pairs it would seem to indicate a defective numbering wheel used for that position.
If it is something that happens in every position number but for a selected range of notes within the ream then it is possible that the numbering wheel may be wearing off.
Open to other suggestions and data.
Left side prefix
{http://img513.imageshack.us/img513/9858/yk39.jpg:http://img513.imageshack.us/img513/9858/yk39.th.jpg}
Right side prefix
{http://img541.imageshack.us/img541/8540/w78e.jpg:http://img541.imageshack.us/img541/8540/w78e.th.jpg}