Professional model, semi-automatic system. Silver-plated keys, 3rd octave key, double F key (left hand F) and double low C key, forked F resonance key, C to Eb trill, low C to C# and low B to C# trill keys, C to E trill ring, Ab-Bb trill key, G#-A trill key, independent connection from low B to low C. The model 2011 have new bell with separated barrel.
1) Instrument built with high quality materials.
2) Fine intonation.
3) Uniformity of notes from low to high, all at the same level.
5) Very easy to play.
6) With some leather pads, double live than conventional ones.
7) Keys silverplated/goldplated with a high thickness to resist over time.
8) Low possibility of wood cracks.
9) Made with selected Grenadilla wood naturally seasoned for eleven to thirteen years.