A Robin's Egg Blue Lantern Vase Incised Seal Mark and Period of Yongzheng

the ovoid body rising to a waisted neck and flared rim, supported on a slightly splayed foot, covered on the exterior with an opaque turquoise-blue glaze of robin's-egg type suffused overall with finely mottled greyish-purple, the base incised with a four-character seal mark all beneath the glaze, the unglazed foot dressed in a brown wash

There is some wear to the glaze of the mouthrim. There is also a faint haircrack across the bottom.
"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."

This ‘lantern’ shape is more commonly known with vase-shaped flanges on either side, and originated in the Yongzheng period when it was made with guan-type and ge-type glazes, but in the Qianlong period it became a common robin’s-egg glaze form (see lot 3091 for a Qianlong example). Vases of this type, but with applied handles, include one in the National Palace Museum, Taipei, included in the Museum’s Special Exhibition of K'ang-hsi, Yung-cheng and Ch'ien-lung Porcelain Ware from the Ch'ing Dynasty, Taipei, 1986, cat. no. 93; one exhibited in Ethereal Elegance. Porcelain Vases of the Imperial Qing. The Huaihaitang Collection, Art Museum, The Chinese University of Hong Kong, 2007, cat. no. 65; another published in Xiong Liao, Gems of the Official Kilns, Taipei, 1993, pl. 144; and a fourth example in the Meiyintang collection, sold in these rooms, 4^th April 2012, lot 6. Compare a Qianlong mark and period red-glazed vase of this form and also without handles, illustrated in The Complete Collection of Treasures of the Palace Museum.  Monochrome Porcelain, Palace Museum, Beijing, 1999, pl. 34.