A gilt-copper repoussé Kalachakra dance mask, Tibet, circa 18th century

American Private Collection.

Another rare dance mask of this form, worn by a lama performing a ritual dance during the Kalachakra initiation, included in the exhibition Monasterios y lamas del Tibet, Fundación 'La Caixa', Madrid, 2000, cat. no. 60, was sold at Christie’s New York, 23rd September 2004, lot 87. See also another Kalachakra mask sold more recently at Christie's New York, 19th March 2013, lot 403, an example illustrated by Giles Béguin, Dieux et démons de l'Himâlaya, 1977, cat. no. 329, and another two in Robert Thurman and David Weldon, Sacred Symbols, The Ritual Art of Tibet, New York, 1999, cat. nos 40 and 41.