清十八 / 十九世紀 白玉瑞獸鈕方印 印文：「子珍氏印」

of square form, the upper section deftly carved as a mythical beast sitting on its haunches, an aperture pierced through its body below its horn, the seal face crisply carved with the four characters reading zizhenshi yin, the smoothly polished stone of even white colour