$1 Bills With Different Colored Serials?

I'll say it, I've never seen anything like that before. I suppose a person could make that alteration themselves but why, other than for profit. That's a neat find though. I'd hold onto them at least.

Light side looks bleached.

Based on information from http://www.uspapermoney.info/general/lepe.html ...

Long story short, the top note is from plate position A1, while the bottom is from B3. These notes were overprinted with the new LEPE system, which serials all 32 notes in a sheet at the same time, so there is no possible way for these two notes to have been serialed with the same possibly under-inked stamper (for lack of a better word).

Additionally, notes that I have seen with underinked serial numbers tend to have the same digit on *both* sides underinked. There is an example on this page ( http://www.panix.com/~clay/currency/2.html ); just search (CTRL+F) for "underink" to see it. This leads me to believe that each digit of the serial numbers of both sides of the note together has its own ink reservoir. Thus, even in the highly unlikely case that all ten reservoirs were running dry, both serials should have been affected.

I had originally thought maybe the left stamper was incorrectly calibrated to not stamp heavily enough, but seeing these two were printed at different plate positions puts that theory to rest.

Thus, I believe they are bleached, probably as relatively new notes, seeing as they come from the same block. (I've also seen many of this block in my area, Mid-Michigan, but have not noticed any underinking).