The two-footed variants are the only ones known to exist and probably belong to the initial production models. The flattened circular foot was subsequently redesigned to the later and better known version lacking the foot, likely when it was realized that the piece was stable without it.

cf. Felix Marcilhac, R. Lalique, Catalogue raisonné de l'oeuvre de verre, Les éditions de l'Amateur, Paris, ref. no. 992;
Nicholas M. Dawes, Lalique Glass, Crown Publishers Inc., NY, 1986, pp. 47 & 99; C. Vane Percy, lass by Lalique: a Collector's Guide, 1977, Blacker, Calmann Cooper Ltd., London, p.32