Marlborough, Massachusetts. $20 1882 Brown Back. Fr. 504. The Peoples NB. Charter #2404. PMG Choice Very Fine 35.This note is one of just two 1882 $20 Brown Backs on the town of Marlborough, MA. The other, grades a fine and has never been offered for public sale from the best of our knowledge. A beautiful example with bright paper, dark overprints, and excellent signatures. One of the finest large size examples for the entire bank. PMG comments Good Color & Embossing.