This Kill 6727, the so-called Bird or Tulip chair, is the hard-to-find version of an office chair with height adjustment. The blue leather comes in excellent condition with beautiful patina and minimal signs of wear. The chrome frame with smooth-running wheels shows hardly any signs of aging. The hydraulic height adjustment works perfectly and allows a seat height of 43 - 51 cm.  This Kill version is the older original version designed by Kastholm&Fabricius for Alfred Kill International. These chairs were continued to be produced by Knoll in a later version. The designer duo Jorgen Kasthom & Preben Fabricius designed these chairs in the style of functional, aesthetic Scandinavian design in the 1960s and created an absolute design icon.