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Does anyone know if a 1920s Martin sousaphone bell will fit a 1959 Martin Mammoth, to be used as a forward facing bell?

It looks like the sousaphone bell has the same small diameter on the tuba end, and 24” on the business end.

But would it have the correct angle for a forward facing bell?

Thanks

Barry

Not positive but most likely the sousaphone bell will shoot out at a 90 degree angle. Whereas a proper recording bell will shoot upwards slightly.

Assuming the bell collars are an actual match, the biggest issue will be visibility.

I would guess a sousaphone bell would also be a few inches longer. The forward facing bell on the larger Reynolds BBb tuba has that sousaphone look, and the alternate upright bell is exceptionally tall, for the same length. Don't know how much it would lower the pitch. Incidentally, I believe I've read that old Martin bells will fit on that Reynolds.