A CELADON JADE OPENWORK SQUARE 'KEY FRET' PLAQUE, QING DYNASTY China, 1644-1912. Carved with a central roundel enclosing a flower with lingzhi petals and surrounded by four key-fret scrolls with finely incised grooves along the edges. The translucent and almost transparent stone of a celadon tone with milky white inclusions. Provenance: The estate of Joachim Hinz, a collector from Hamburg, Germany. Condition: Very good condition with minor wear, traces of use, minuscule nibbling, the stone with natural fissures, some of which have developed into small hairline cracks over time. Weight: 61.9 g Dimensions: Size 7.1 x 7.1 cm Auction result comparison: Compare with a related plaque, of closely related size and form but reticulated and depicting chilong and lingzhi, at Sotheby's New York in Fine Chinese Ceramics & Works of Art on 17-18 September 2013, lot 90, sold for USD 5,000. 清代青玉四方鏤空雕回紋牌 中國，1644-1912年。中央圓形鏤空，一朵四瓣靈芝形花瓣的花朵，周圍環繞著回紋，近乎透明的青色玉石帶有乳白色內含物。 來源：德國漢堡Joachim Hinz收藏 品相：狀況極佳，有輕微磨損，使用痕跡，微小的磕損，天然裂紋，其中一些隨著時間的推移已發展成細小的裂縫。 重量：61.9 克 尺寸：7.1 x 7.1 厘米 拍賣結果比較：一件相近但鏤空雕刻螭龍靈芝紋的玉牌見紐約蘇富比Fine Chinese Ceramics & Works of Art拍場2013年9月17-18日 lot 90, 售價USD 5,000.