Pleasanton, California. $20 1902 Date Back. Fr. 645. The First NB. Charter #9897. PMG Choice Fine 15.This is just the fourth large size note to come forward from this Alameda County bank and it is the only 1902 Date Back known for the charter. This Pleasanton bank was chartered in December of 1910 and it issued $326,750 through the end of the National Currency era in 1935. This $20 retains dark inks and still legible bank officers signatures.