"Nok is the name of a town on the Jos Plateau in Central Nigeria where fragments of terracotta sculptures were found in 1928. Many more fragments and intact figures, both animal and human, as well as heads have come to light in subsequent years. While sharing the same style, called Nok after the site where the discovery was made, a number of the findings show a striking variety.
"Radiocarbon and thermoluminescence dating methods have revealed that the sculptures were made between 600 BC and AD 250.
"Because some terracottas were encountered in association with stone and iron objects, the Nok civilization is considered to be the oldest Iron Age culture of sub-Saharan Africa."
Extract from: South of the Sahara
© 2003 The Cleveland Museum of Art
Nok Head #01 • Collection Samuel and Gabrielle Lurie, New York
Nok Head #02 • Private collection
Nok Head #03 • Private collection
Nok Head #04 • Private collection
Nok Head #05 • Private collection
Nok Head #06 • Barbier-Mueller Museum, Geneva • Accession #1015-103 • Reproduced in African Terra Cottas, A Millenary Heritage edited by Floriane Morin & Boris
Wastiau (Musée Barbier-Mueller & Somogy Editions d’Art, 2008), p. 196
Nok Head #07 • Private collection
Nok Head #08 • Private collection
Nok Head #09 • Private collection
Nok Head #10 • Private collection
Nok Head #11 • The Minneapolis Institute of Arts • Gift of funds from Darwin and Geri Reedy
• Accession #2002.27.16
Nok Head #12 • Private collection
Here is a 3D scan of one of those Nok heads: