F. A. Uebel 740 Bb Bass Clarinet, German System, tuning in B, tuning slide in the S- bow, 4 thumbkey to deep-going C, B1 mechanics with 2 automatic-switching duodecime key connection, 4 trills on the upper joint, forked B and F mechanics, double C- and F-flap lever F, H cis trill, adjustable thumb holder with ring for carrying cord, S- bow, cups and keys silver plated, incl. luxury case and Hanns Zinner mouthpiece