Has anyone started collecting these?
A recent discovery by R. Azpiazu are 1963-A $1 FRNs with 1963 plain backshttps://www.fstctycurr.com/frn_1-1.html
I am all-in for collecting notes in any way, shape, and form that one finds enjoyable... however, categorizing these as mules is a misnomer.
Plates were made to use until they wore out. The fact that some backs were still in use when 1963A faces were introduced is not compelling enough to categorize them as a significant sub-variety. Feels like a marketing ploy to sell more notes IMO.
The same is true for so-called 1963 plain FRN mules w/ backs used on SC's. It's just the natural progression of plate use by the B.E.P.
Now had there been a noticeable design change difference like a change in location of the plate serial numbers or the actual "Mule" micro/macro match up then this would have become an extremely intriguing variety to be sure!
Agree 100% with @Tookybandit above.
Left to right - James (Jim) Hatch, Me and Robert Azpiazu at the FUN Show, 2018, Tampa Florida. Unfortunately, Jim passed away last year.
I love that picture!!! Three great guys.
If I concentrate I can hear Jim's voice from my memories. He was an amazingly nice person, always full of smiles.
Haha, if you look in the background at the sign it is supposed to say Jim "61" but instead it say GI ...I remember him pointing that out when I was at his table and us laughing about it.