This single Bb horn with A muting valve and F extension is not a typical single Bb. The horn has a large bell throat and gives it a nice big sound, with the upper register advantages of a single Bb. The F extension intonation is so-so, but fills in notes that cannot be used on a single Bb. The extension operates off the muting valve and is activated with a change rotor which can be set to use the extension or not (not lever activated). It is un-lacquered brass, in excellent condition. Comes with a hard plastic case.
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