Bb Helicon made by Boosey & Co, since 1934 known as Boosey & Hawkes. Caried over the shoulder, the weight is 7,5 kilograms. The Helicon is precursor of the Sousaphone, the American version of this instrument is now also often seen in Europe.
This instrument needs a lot of rapair on the first valve because of improber handling, also quite some dents and breaks needs reparir.

Closeup on the manufacturers sign

Other informations
Made by: Boosey & Co. England
Made in: 1901
Materials: Brass, no lacquer
Sizes: Bell diameter: 33cm (13"), curve diameter: 74 cm. (29 1/8")
Condition: Avaiting restoring