Tibet
Tibetan

Silver, copper, conch shell, turquoise, coral
Early 20th century
Length: 14 in
Aerophones – Wind Instruments Proper – Lip Vibrated

These white conch shell trumpets are traditionally referred to as dung-dkar.  Those that feature an attached wing with an elongated posterior rod, made with a copper and silver-plated brass wing, bears the special designation of rag gshog-ma. The repoussé on the wing depicts a sea dragon (makara), representing association with dominance over the sea, and the water element, plus eight auspicious symbols.  The extended wing also lengthens the cavity, producing a lower pitch.  The tip of the shell is cut off and a metal extension forms the mouthpiece.  To play, one buzzes their lips while blowing into the mouthpiece.  This left-turning conch shell is used to summon monks to prayers and is used as a ceremonial trumpet in prayer rituals. 

The term dung is used to identify several types of Tibetan trumpets:  a) rang-dung (brass trumpet); b)  zangs-dung (copper trumpet); c) rkang-dung (femur trumpet); d) chos-dung (trumpet of religious law); e) dmag-dun (war trumpet); f) khrims-dung (trumpet of justice); and dung-chen (large trumpet).

Resource:  “Dung,” Mireille Helffer, “The Grove Dictionary of Musical Instruments,” 2nd ed. Laurence Libin, Editor in Chief.