Modell 27

Standard, curly mountain maple in dark-red finish, silver-plated mechanism, reaching down to sub-contra Bb, with keywork adapted for comfortable reach

Six rollers: one each on C key (wing joint) and Eb key (wing joint), one each on F key and Ab key for little finger, one each on low C# and low D# key

Eb lever for first finger right hand, F# key for right little finger, adjustable rest for the index finger left hand, long keys held by special support, adjustable spike, tuning slide, nylon-lined pivot screw keys, adjustable pivot screws in two parts (with lock-nuts), two crooks

Right hand