Rockwood, Pennsylvania. $10 1902 Plain Back. Fr. 633. The First NB. Charter #5340. Very Fine.A new addition to a previous four known large-size on this Somerset County town of Rockwood. Just two banks issued National Currency in the town with the other being the Farmers and Merchants National Bank, a charter even more challenging for large-size with just two notes known. This attractive Very Fine offering on the First National Bank retains bold signatures and mostly even circulation, save for a few minor edge nicks and a bit of foreign substance at back.