Combination drum.

Technical description: Upper head tuned (pedal control) and played with hard sticks; lower head played as bass drum by pedal beater. Cylindrical shell mounted by four legs on tensioning mechanism with pedal, made from aluminium castings. Depressing pedal causes upper head to be tensioned by raising an internal hoop. A damper plunger is fitted to the top head on an external chrome finish strap whic…