Mom left you some cool stuff! Again, I'm not a paper guy, so I'm out of my depth here, but these obsolete types are certainly beautiful, and I know some of them can be pretty valuable.
I believe the serial number on the top right is the Federal serial number and the lower left serial number is the issuing bank serial number.
The large, blue M near the serial number helped with the sorting. The BEP used N (north) S (south) E (east) W (west) M (Midwest) and P (pacific)
I know less about paper money now that I’ve spent some time doing research. Lol These things don’t auction a lot when you search for a specific bank. And some, like this one, just don’t have much of a graded population. I think mine’s better that what I’ve found and those auctions were years ago. But I did find Blooming Prairie on a map.
From the photos I would agree. PMG is good for notes. I have a friend that deals in CSA Notes so he sends them in for me. I just pay the fees and mailing costs. I would suggest your finding someone reputable, someone that you can trust to perform this for you. I give my note to my friend, he sends it to have it graded, then he contacts me when it’s back. We set up a meet and I pay him and I get by the note back. I don’t know if you’ve seen this before but this is one of the notes that he had graded for me. Not trying to steal your thread but I want to give you a good idea of what’s involved.
The close place is an hour away and an unknown LCS. I just know mine better than this… You have a nice piece of paper there.
From your photos I would hazard a guess at XF-45, maybe AU-50. I would more inclined to go with the XF-45 but I don’t have the bill in hand. Yours is much better than the VF-25 and thanks for the comment on mine.
I looked at PMGs website and it seems it might be worth the $25 to join so I can submit the few bills I have myself. Since I paid no cash for them (inherited) I’m not really losing anything even with grading costs.