both elegantly potted with tapering sides rising to a domed cover surmounted by a circular knop, the stoneware of a rich red colour applied with a glossy stained slip, the countersunk base impressed with four-character mark within a double square 

Left teapot: 0.2cm nick to flange Right teapot: 0.5cm shallow nick to flange Other minor nicks and rubbing to the surface.
"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."

Another Jiaqing reign-marked Yixing stoneware teapot from the Qing court collection, of similar form and clay colour, with similar impressed mark, is preserved in the Palace Museum, Beijing, illustrated in Yixing Zisha Wares in the Palace Museum, Beijing, 2009, p. 111, pl. 51.

See also a closely related pear-shape teapot, signed Yuxiang Zhai, recovered from the Nanking Cargo, from the collection of K.S. Lo, now in the Flagstaff House Museum of Tea Ware, Hong Kong, included in the exhibition Yixing. Purple Clay Wares, H🌼ong Kong Museum of Art, Hong Kong, 1994, cat. no. 105, where it is noted that Yixing teapots were introduced to Thailand as early as the Ming dynasty, with increasing numbers exported during the Qing period. They were characterised by their globular, cylindrical or pear-shaped bodies and glossy polished surfaces, the rims of which were often embellished with metal rims (see p. 31). For other teapots of this form sold at auction, see an example sold in our New York rooms, 26th February 1983, lot 535, and another at Bonhams Hong Kong, 28th November 2011, lﷺot 253.