Alto horn.

Technical description: Lacquered brass, spun bell flare with circumferential seam. The valves are at an angle to the main vertical axis of the tubing. Detachable bell which can be oriented in any direction in a horizontal plane, secured by a single screw passing through a threaded collar on the body bearing onto the tenon on the bell flare. With thumb-ring for R0, water-key and fitting for music card holder. There is a sleeve inside the mouthpiece receiver, probably intended to allow use with a french horn mouthpiece.; Nominal pitch: E?.; Type or system: With moveable bell.; ; ; ; Usable pitch: Probably built for use at circa A?=|435|Hz.;