Worth of 1957B series silver certificate
I have a ONE DOLLAR Silver Certificate that is a 1957B series. The signatures are that off Kathryn O'Hay Granahan (Treas.) and C. Douglas Dillon (Sec. Treas.). The color of the seal and serial numbers is blue and there is no star before the serial number. "SILVER CERTIFICATE" is written on the very top of the note.
The grade of the note I would say is CU. I received the note while working at a bank from a customer who was a collecter. There is the slightest two almost bends on the left and right top corners and a few other bends (not folds) from my handling but no folds at all. Inking and portrait are in "perfect" condition - meaning not faded one bit. The serial number is "X 04327564 A"
Also to the right of where 1957 B is located is a letter/number combo: A 768
Also on the top left front to the left of the word THE in small print is: A4
On the back of the note it is in "perfect" condition as mentioned above with no fading in ink. Below the giant E in the center and to the right a little is an imprint of 422
Any help in what this could be worth would be greatly appreciated! I hope I included everything! Thank you for all your help!
SG in Orlando :)