Hans Hoyer 6801 Heritage F/Bb- double horn, nickelsilver valve box, 3B- ball joints, nickelsilver inner- and outerslides, Ø 310 mm bell, 11,90 mm bore, goldbrass leadpipe, engraved valve caps, fixed ...

Hans Hoyer G10 F/Bb-Double Horn, Geyer valve setup, 4 rotary valves with F/Bb switch valve, 3B ball joints, bore: 11,90 mm (.468 "), bell diameter: 310 mm (12.653 "), adjustable thumb lever ...

Hans Hoyer K10A F/Bb- horn, Custom- Orchestra Series, 3B ball joints, screwable medium large bell, brass body, bell size Ø 310mm, bore size: Ø11,90 mm, raw- unlacquered, incl. mouthpiece and lightca...