Girsberger is a German manufacturer of tables and chairs for the workplace. All of their designs are fairly progressive, so if you see a hip looking task chair in an office photo and the chair is not obviously an Aeron or other new cutting edge task chair then its likely it may be a Girsberger.
The AL3 chair is an aluminum framed task chair with a mesh back and thin pad seat. The undercarriage of the chair is very elegant with no obvious springs or exposed machinery. Yet the smooth organic form bends and gives where needed to provide recline and adjustment. Note the way the arm supports slide through back support member during a recline motion.
The aluminum frame is offered in three finishes, black, natural polished aluminum, and a grey chrome. These remind me of custom alloy wheels! See more at the Girsberger site.