Hornbostel-Sachs number: 423.121.11 End-blown straight labrosones without mouthpiece, A. Length: 532mm (20.9 in.), Diameter: 28mm (0.8 in.), B. Length: 531mm (20.9 in.), Diameter: 49mm (1.6 in.), Place of production: Johannesburg (South Africa), Creator: Allen Alfred, Johannesburg, Date of creation: After 1933