Excited by a new material (Alu-Grey), Christoph Ingenhoven returned to the major door handle design of the 1990s that FSB had marketed as the Frankfurt Model in the late 1980s, when it had picked up on a design idea Mallet-Stevens had in 1923.
Ingenhoven retained the mitring but radically reinvented the handles gripping credentials by combining a flat top and bottom with a well-rounded body.
Coordinates with FSB window lever design 3778.