13th-6th century BC. A bronze discoid shield boss with raised and domed centre, with a pearled reposè border from which four spirals radiate; central perforation for attachment to a shield. See Godard, A., Les Bronzes du Luristan, Paris, 1931, pl.XXV, no.75, for a very similar decorated umbo. 165 grams, 17.5cm (7"). Ex important Japanese collection, 1970s-2010. All Kassite or Luristan shield studs are circular, and more or less of the same size. They are, as in this splendid specimen, decorated ing reposè technique and often with a series of spirals or sometimes cabochons around the raised central section.