A pair of casts of these models, catalogued as Florentine, second half of the 17th century, are in the Bayerisches Nationalmuseum, Munich (inv. nos. 1091 and 1077). Another pair were formerly in the Abbott Guggenheim Collection, see M. Schwartz, European Sculpture from the Abbott Guggenheim Collection, New York, 2008, p. 181, no. 96.
Overall the condition of the bronzes is good, with some dirt and wear to the surface consistent with age. There is particular dirt in the crevices. There is minor rubbing to the lacquer patina at the high points. There is some flaking to the patina in areas, notably to the Sibyl's headdress and drapery at the arm and waist, and to the Prophet's drapery at the proper right arm. There is minor dark spotting to the terrasses.
The ebonised wood bases are in good condition, with some small chips to the edges and some rubbing. There is minor evidence of past worming to the Prophet's base. There is minor stable splitting to the wood, consistent with the material. "In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."