Very rare, semi-open orthodynamic from the late 1970s. Built by PMB (Peerless Mikrofon-Bau) and features its most advanced driver, 55 mm with holes out to the very edge and steel plates to improve the magnetic strength.

Has been modified, with damping felt and sealed baffle for better bass and imaging. Pads have flaked but a fresh pair are included, as is an original service manual.