Karen Davies, At Home in Manhattan:  Modern Decorative Arts, 1925 to the Depression, New Haven, 1983, p. 115
Janet Kardon, ed., Craft in the Machine Age: The History of Twentieth-Century American Craft 1920-1945, New York, 1995, p. 160 (for the "Rectangular Art Deco" vase, Model No. 2425)

Overall in very good condition. Each vase with light surface scratches consistent with age and gentle use and occasional edge flecks and minor chips to the apertures only visible upon close inspection. Each vase with air bubbles and minute particulate inclusions inherent in the making and not visually detractive; one black vase with a small burst air bubble to the surface. Some vases with minor traces of adhesive residue. A very nice group showing great variation of color and form.
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.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.