A Dark Celadon Jade Imperial `Book Cover` Plaque, Qianlong Period, 18th Century清 乾隆「慎德念功」青玉填金双龙纹册页 The rectangular form jade book page demonstrating sea-green tone, the front incised and gilded with a pair of ferocious confronting dragons above rocks and waves, inscribed with the four-character title ‘Shen De Nian Gong’, the reverse inscribed ‘In honour of the Gurkha tribute elephant horse to the capital Beijing. Preface. The Gurkha war since…’, jade 5.5 x 3.3 in — 14 x 8.5 cmProvenance:Mr. Loo, San Francisco Private Collection来源：旧金山卢氏私人珍藏Note:Compare with examples from Sotheby’s New York, March 17, 2021, lot 167; Sotheby’s New York, March 22, 2022, lot 27; and the Palace Museum, Beijing, accession number 00104472类似工艺请参考纽约苏富比2021年3月17日，拍品编号167纽约苏富比2022年3月22日，拍品编号27北京故宫博物院编号，故00104472Estimate: $6,000—8,000