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Does anyone know if a 1920s Martin sousaphone bell will fit a 1958 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

The tenon from a 20's Martin Mammoth sousa or recording bell is slightly smaller than the later recording and sousa bell tenons which are 7 and 7/8 inches in diameter. The change came around 1930 or so when they re-tooled.

And unless I'm mistaken, sousaphones have basically a 90 degree elbow, whereas recording bells have like a 60 degree elbow, with the bell pointing upwards slightly.