Pittsburgh, Pennsylvania. Mechanics Bank of Pittsburgh. May 1, 1861. $1. Very Fine.,(PA-540 G2a) NBNC. Green border prints. Green signature panel and large green ornate "1" protector left of center. Vignettes and counters in black. Two bee hives at bottom left. Blacksmith right of center. Girl at bottom right. Ornate die counters at top left and right. A brilliantly colored and fully issued Ace from this Pittsburgh bank. Just moderately circulated with bright paper. The signature panels have been punch cancelled.