D
T
E
J. Those are the initials of the months, backwards from December through July. The next would be June.
d
The series appears to be following a pattern where the letters are increasing in alphabetical order, skipping some letters. The pattern is A (skipping B) D (skipping E, F, G, H, I, J, K, L, M, N) O (skipping P) Q. Therefore, the next letter in the series should be R.
T
E
J. Those are the initials of the months, backwards from December through July. The next would be June.
The J is not a series letter, it is the code for the issuing Federal Reserve district. The series letter (if any) is located next to the date. If there is no series letter, or A through D, your bill is worth face value to $22. A dealer will pay face only. If the series letter is E, it could be worth $40 to $60.
"D" is the highest series letter for a 1934 $10 FRN. The series letter is next to the date. A "J" would most likely be a Federal Reserve District letter. Please see the Related Question for more information.
D
The next letter is D. The pattern is every fourth letter. Ie. a b c D e f g H i j k L m n o P and so on...
d
The series appears to be following a pattern where the letters are increasing in alphabetical order, skipping some letters. The pattern is A (skipping B) D (skipping E, F, G, H, I, J, K, L, M, N) O (skipping P) Q. Therefore, the next letter in the series should be R.
k comes next, and then l.
The sequence alternates between skipping letters. Starting with "j," it skips "i" to "h," then skips "f" to "g," and skips "e" to "d." Following this pattern, the next letter after "d" would skip "c," resulting in "b."
I think it's M.B is the second letter, C is the third, D is the 4th. The difference between these letters is one. D-G is 3 and G-J is 3 so I'd assume that the next letter is the third after J which is M.2-3-4-7-10-13