Hornbostel-Sachs number: 423.22 Slide trumpets, Body. Height: 49mm (1.6 in.), Width: 98mm (3.5 in.), Length: 598mm (23.2 in.), Bell. Diameter: 108mm (3.9 in.), Crook. Height: 30mm (1.2 in.), Width: 79mm (2.8 in.), Length: 184mm (7.1 in.), Place of production: Great Britain, Creator: William Wyatt, Date of creation: After 1890, An additional slide...is added and is secured to the ordinary slide and moves with it. This makes an extra length of tube available so that any note down to Eb (in the third space of the bass clef), can be obtained' (William Wyatt from patent application)/(with two rings for the fingers to draw the slide). It has a bent mouthpiece, which is to ensure that the slide misses the chin.