The Series of 1922, also known as the Fourth Bureau Issue, consisted of sheet, coil, and booklet stamps. The stamps of this series were printed on flat plate and rotary presses and had several different perforation sizes. The frames, basically uniform in design, incorporated a variety of subjects. Like the previous Bureau Issue, Benjamin Franklin and George Washington were portrayed on the most commonly used stamps, the 1-cent and the 2-cent. Some other subjects in the series had also appeared on U.S. postage stamps. Boldly innovative, numerous stamps featured icons of American culture-an American Indian, the Statue of Liberty, California's Golden Gate (before the bridge), Niagara Falls, a buffalo, the newly-dedicated Arlington Amphitheater and Lincoln Memorial, the U.S. Capitol, and the head of the statue of 'Armed Freedom' atop the Capitol dome (mistakenly called 'America' on the stamp). The .5-cent through 15-cent have a vertical orientation, and values from 17-cent through 5-dollar have a horizontal orientation. Some collectors also consider the Harding Memorial stamp as part of the series.