Keyed trumpet in G, brass body, keys and garland. Four flat keys in saddles, two mounted in flat stays. Tuning slide. Associated mouthpiece. Two keys lack pads. Lacks crooks.
The keys on this trumpet enable it to play melodies in its middle and lower registers. This would have been a surprise to listeners used to the natural trumpet, which could only play the notes of the harmonic series, making melodic playing practical only in the upper register. Joseph Haydn, impressed by the keyed trumpet's melodic capabilities and its ability to play chromatically, wrote a concerto for it in 1796. Some notes on the keyed trumpet sound louder than others. This eventually led to its replacement by the valve trumpet.