The seat comprises a support column which has a head section (52) adjustable to different rest heights relative to the foot section (12) by a gas spring height adjustment device (22). First and second stops (64,66) lie against each other in the axial direction. The head section is situated in the normal rest angle position relative to the foot section. At least one of the torque providing surfaces (66,70) rises in the circumferential direction about a telescopic axis (A) relative to the axially normal reference surface.
