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Model 730
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Ring system, silver plated mechanism, French
fingerings reaching down to low Bb, double automatic octave
keys in connection with half-hole key, 3rd octave key for
high register, Ab-Bb trill key at the side, C and Bb to be
played with each of the three fingers of right hand, closed
forked F mechanism, long F key for left hand, F roller, low
B-C# trill key, low B-C connection, resonance key for low
Bb, resonance key for balance of low B intonation,
adjustable swivelling thumbrest
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