This is a set of five 40/4 chairs, initially designed by David Rowland in 1964. The listed price includes all five chairs as shown. This iconic chair has been praised as one of the most ingenious modern designs of the 20th century, and has been credited for being the first truly stackable chair.
These examples are important as they were formerly utilized in Skidmore, Owings, and Merrill’s Chase Manhattan Bank project. They all maintain their original tags. SOM was the firm that originally helped to make the 40/4 chair a viable product. They ordered 17,000 of them for UIC Chicago, which helped Roland and the product thrive afterward.
Each chair has a solid steel sled base, and has a brown plastic seat and back. These examples were manufactured by GF Business Equipment (part of General Fireproofing Co) in the 1970s. Later, the Howe corporation would come to buy the rights to produce the 40/4.

Each chair measures 21 inches deep, 19 inches wide, and 30 inches tall. The seat height is 18 inches. These examples show some scratches and scuffs to both the bases and the seats. There are indentations on the metal seats, and there is some patina on the frames. Overall, they remain in good condition. Please see photos.