Here's mine and I have only found one ever too. Mine has the Letters the same too, "D" at the start and end. It's called a palindrome or as was said, a radar bill. It can be read the same forward or backwards.
There's even a rarer bill, one that can be read the same forwards and backwards, rightside-up or upside-down.
It's palindromic and anagramic. It reads the same from every direction.
I read somewhere that there would be 256 possible $1 bills in each series at each bank or mint that do this, being both palindromic and anagramic. Four possible anagramic numbers 0, 1, 8, with 6 and 9. There are a total number of bills of 99999999 serial numbers but I would think that less than that amount are printed, which means fewer then 256 which makes it very rare to be both palindromic and anagramic.
Good luck finding one of those!
Smiles!
BDoo