Pittsburgh, Pennsylvania. Mechanics Bank of Pittsburgh. Sept. 22, 1855. $20. Fine.,(PA-540 G10 SENC) Draper, Welsh & Co. Phila. 20 on die at center. Blacksmith with arms crossed leaning on anvil at left, TWENTY curved in corner above. Three allegorical women at right. 20 in bottom right corner. Red TWENTY protector over signature panels. A rare higher denomination type we have not previously offered from this Pittsburgh bank. Unseen by Haxby as all but the $1 denomination were.