Courtesy of: http://camerapedia.wikia.com
The famous press cameras of Graflex were made in a number of variants and in several formats.
The earliest models were available in 3×4, 4×5 and 5×7 formats. By 1939-1940 the 5×7 format was dropped and the 2¼x 3¼ format was added. Focal plane shutters were available from the beginning until 1970. Models with a focal plane shutter can use lenses mounted in shutters or barrel lenses (without shutters). The Pacemaker Crown Graphic, introduced in 1947, was the first model available without a focal plane shutter.
Pre-Anniversary 1928-1939: 4×5 and 5×7, (also 3¼ x4¼ from 1935 to 1939) Had larger lensboard. Focal plane shutter.