Pittsburgh, Pennsylvania. Merchants & Manufacturers Bank of Pittsburgh. 1850s $50. PMG Choice Uncirculated 63. Proof. (PA-545 G34a Unlisted). Bald, Cousland & Co., Philad. & New-York, India paper only. Deep vermillion 50 counters in opposite corners. Upper left, iron works in action. Lower right, woman holds dove. PMG notes Minor Stains. A very challenging and attractive high denomination Proof.