I know nothing but what does this mean?

[sabertooth]

So I was just looking at my bills because the post on here have sparked my intrest. I found something odd(maybe just odd to me) on one of my twenty dollar bills.
Serial #GF21633324C and where the date is it says Series 2004 A? My question is what does series A mean . None of my other 20s have this even though I have 2 other 2004 bills? Any help would be great as I know only 2 things about paper money Jack...and well the other guy left town...
Thanks
Sabertooth

[jeff of pa]

Check if the Treasurer or More likely
Secretary to the Treasury signature is different.

I Always took for granted the series changes
when a signature or other feature changes.

[sabertooth]

It is John W. Snow I think the seal looks the same to me... SNow is also on my other 2004s
ST

[sabertooth]

Ok I think I see the difference now One is Signed by the Treasurer of the US Poserio ...someone and the other well the 2004 A is signed by Anna Escobredo Calral. Not sure if it makes the bill worth keeping though?
ST

[jeff of pa]

Not that I'm aware.

Unless the one before Left under Disgrace
Or Murder Shortly after Taking the Job