Pair of Don Chadwick heaters by herman Miller 1970 vintage armchair design

Good morning. Nice pair of 1970s heaters. By don chadwick edited by herman miller. Compact foam covered with a blue cloth resting on a rigid grooved plastic base. The foam remains firm and the foot are in tbe. The original fabric has some wear, stains and a few small holes but remains in a beautiful vintage state. Carry the publisher's label under each.