Bass trombone. Nominal pitch: G+(D -D♭).
Technical description: Silver-plated brass; inner slides not plated. The main tuning-slide is possibly a longer alternative of two originally supplied. Length of valve tuning-slide 120 allowing increase of air column length by nearly 240mm. Smooth light wooden handle. Valve type: Banana-plate rotary valve with simple helical tension spring and wire to ring for thumb.