Uhlmann developed this type in 1835, first as a bass and then in the contrabass version on display. Also in 1835, August Guichard in Paris developed a different valved ophicleide and Wilhelm Wieprecht in Berlin invented the tuba, which finally became the prevailing valve bass.
Marking: (engraved on nickel-silver shield on bell) Verferdigt/in der K:K:/Priv. Instrumenten Fabrik/des Leopold Uhlmann/in Wien.
Mary Elizabeth Adams Brown
"The Brass Instrument Collection of The Metropolitan Museum of Art in New York." Historic Brass Society Journal (1999), vol. 11, pg. 147, ill.
Catalogue of the Crosby Brown Collection of Musical Instruments: Europe. The Metropolitan Museum of Art. New York, 1904, vol. I, pg. 194.
Catalogue of the Crosby Brown Collection of Musical Instruments of All Nations: I. Europe, Galleries 25 and 26, Central Cases of Galleries 27 and 28. Catalogue., The Metropolitan Museum of Art. New York, vol. 13, pg. 194.