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I have, what looks like, an old miraphone BB tuba at the college I work for and we need to order a hard case for it. I measured it and the bell is 16.5" and the height appears to be ~43". I am looking into the MTS1209V hard case for large frame tubas but I cannot find anything about the height it will accommodate. If anyone has a recommendation for what type of case to use, I would be very grateful.

Thanks in advance for your help!

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Here is a link to a pic of the horn in question. Thanks in advance.