Besson Enharmonic Baritone

This is an Enharmonic Baritone.

As per the Enharmonic Trumpet in the collection, these instruments featured two sets of tuning slides on the first and second valves, one of which is slightly longer than the other. When the third valve is pressed, air is redirected through a different path in the valves, such that the longer slides are used if the first or second valve is pressed.

Serial number is 91xxx.

Record indicate this instrument was manufactured in 1909.