Gilmer, Texas. $20 1902 Plain Back. Fr. 659. The Farmers & Merchants NB. Charter #5741. PMG Very Fine 25.Boldly penned bank officers signatures are featured on this evenly circulated $20 Plain Back from this better Upshur County bank. This is just the third $20 Plain Back known on the bank and only the 14th large size note to come forward on the bank.