清 田黃臥馬鈕「振緒堂印」方印 Qing Dynasty period. Of square form, the seal is carved at the top with a recumbent horse detailed with incised mane, its tail swept to the side, its head turned back with mouth agape, the seal face carved with four characters, the golden caramel tone stone with characteristic 'radish fiber veinings' and 'red veinings' of natural Tianhuang stone. 來源: 三藩市私人藏家收藏