Searched the forums, couldn't find anything on a 2013 series with a blue treasury stamp. Seems odd because in researching, I found that the last blue seals were printed in the 50s. Also the serial number top left is blue. And the middle right serial is green then blue.
A bluish fade across Abe's face as well.
Seems like an ink error. Condition is pretty meh, but I thought it was pretty cool! Let me know what ya'll think.

