I assume this is bled onto the bill from something else. Only odd thing is that under the micro-scope the ink doesn't necessarily appear to on top of the paper or final printing, more inside if that makes sense. Pretty sure this is a spender but want a 2nd opinion before letting it go. Thanks.
Also note that the numbers you see only add up to 6 total and do not correspond with the serial number.
I think they're larger and a different font as well. Just wanted to make sure they weren't the combination to the vault at Ft Knox before letting it go. Thanks for the responses.