San Augustine, Texas. $20 1902 Date Back. Fr. 642. The First NB. Charter #6214. PMG Choice Fine 15.It has been over 19 years since a large size note has been offered on this extremely scarce San Augustine County bank. San Augustine is a small town in east Texas just near the Louisiana border and had just two issuing banks, Charter 6245 still being unreported. With this note being newly discovered, the total census is now at four large. The last large to be offered was in 2000 where a Very Good sold for $1,100. The note still retains excellent penned signatures.