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Gebr. Alexander mainz, modelo 164, BBb Flat tuba, 4 rotatorio,c el Kaisertuba|bbb tuba|tuba crotary tuba - AliExpress
The Berliner Tuba - For sale/Zum verkaufen in Berlin. 1980s B&S/Weltklang Kaiser BBb-Tuba Model 104. In beautiful condition and plays like a dream. This is the B&S version of the famous Alexander
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