Bass tuba (low B-flat)

This instrument is associated with the Cyfarthfa Band, one of the greatest and oldest virtuoso nineteen-century brass bands, founded in 1838 by iron magnate Robert Thompson Crawshay. It is a bass tuba with an upright bell, made of brass with nickel silver trimmings and mechanisms. It has four rotary valves with clock-spring mechanism and mechanical linkages (some elements broken and/or missing). It has one water-key located on main tuning slide. The second valve tuning slide has a pulling ring. There is also a lyre holder, two carrying strap ring plates, and a thumb holder ring plate. Nominal pitch: low B-flat.