The makers say
Symphony‚ key of
Eb‚ 7" (178mm) bell‚ .491/.500" (12.47/12.70mm) bore‚ Bb rotor
attachment‚ brass outer slide‚ chrome-plated inner slides‚
lacquer finish‚ 7C
mouthpiece‚ deluxe woodshell case. An alto trombone with slide
positions in the
same relative positions as those of a tenor trombone. The
unique Bb rotor offers
added facility in difficult passages
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