Sold. Sold. A Fairbanks postal scales with rotating balance arm. Sliding weight directly reads postage (in cents) on four different scales, 2 on one side of the arm and 2 on the other side. Properly operated with balance arm pointing to the right: Position sliding weight so it reads "Letters" at the top and "Periodicals" at the bottom. Chart at top of balance arm is for letters calculating proper postage of the day. Lower chart is for books and periodicals. Rotating the balance arm 180 degrees brings up the chart for "Merchandise" at the top of the register. Arm rotates easily. The bottom of the register is for "Newspapers and Periodicals". Ingenious. Things got a little more complicated as time wore on and postal rates changed. Scales operate without problem. Original pin striping and nickel plating is worn from use. A little rust here and there. C.1880. Cosmetic condition good. Overall width is 13-1/2 inches. Weight about 4 pounds.