Cf. Willi Goder et al., Johann Friedrich Böttger die Erfindung des Europäischen Porzellans, no. 147 and 148 for a red stoneware example and a coloured porcelain example respectively. This bust was first modelled in red stoneware in 1711 and is mentioned in the inventory for that year as Kinder-Köpffee; see also Rainer Rückert, op. cit. for a stoneware example; and Yvonne Hackenbroch, Meissen and other Continental porcelain Faience and Enamel in the Irwin Untermyer Collectio, pl. 58, fig. 83 for a coloured example and a wax model