F. Schottmuller, Wohnungskultur und Mobel der Italienischen Renaissance, Stuttgart,1921,p. 195, plates 476-479, illustrates a virtually identical portabusto in the Bardini Collection, Florence. Also see another related example in the Museo Nazionale, Florence, reproduced by A. Pedrini, Italian Furniture and Decorations of the 15th and 16th centuries, London, 1949, p. 142, fig. 364.
Other comparable examples have been sold in these Rooms as lot 134, Haute Epoque sale, 29th October 2003 and lot 77, Haute Epoque Sale, 1st November 2005.