This is a Rookwood American art pottery letter holder, dating to 1956.
The letter holder is 3 1/8” high, 4” long and 2 ½” wide.
The shape is rectangular, with a partition in the middle to hold two sets of envelopes.
The glaze is blue or a blue-gray. The inside of the holder is a lighter shade of the glaze. The front has a design of the original American five cent stamp, with the date 1847, and the words “ The First US Postage Stamp.”
There are no chips or cracks. There is crazing, which is the nature of art pottery.
The impressed mark is the conjoined Rs with the lines radiating outward. Below is the Roman numeral date for 1956 of LVI. Below that are the words Rookwood Cinti, O., which stands for Cincinnati, Ohio.