What is this Antique Brass Instrument on display at the Musical

Does anyone know what type of instrument this is? It looks like some type of Euphonium, but obviously very different.

Attributed to Gautrot aîné, Alto Saxhorn in B-flat, French

Late 19th Century Antique Brass Cornet - Musical Instrument in

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EVay only allows for 12 unlike many others ! Can’t believe that it’s still listed ….

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Nothing else sounds like vintage brass: These CSO musicians are

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Made In London ( United Kingdom / England ). 70- 80 Years Old Antique. In Good Original Condition. ( As Per Age ). Has Boosey & Co. Trade Mark With

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