instrument identification?

[cjk]

Check your email.

Looks like the bariphonium players on that record were M. Dee Stewart and Glenn Dodson.

M. Dee Stewart is playing a front piston valve American looking baritone.
Glenn Dodson is the one holding the rotor instrument.

[cjk]

Maybe someone knows what kind of rotor euph Mr. Dodson played on one of the trombone forums.

[kingconn]

I remember seeing an old Conn catalog showing Dee Stewart as a factory artist.