A: Harpocrates sitting to left on a lotus flower in the middle of a papyrus boat. Originally: two falcons sitting on both ends of the boat facing each other, now the left falcon is missing as the gemstone is broken. The god’s knees are drawn up, his right hand raised to his mouth, his left holds a flail. A long side-lock of youth is falling to his neck. On both sides of Harpocrates a snake is facing the god, the left one is a uraeus. Behind the snakes two ithyphallic cynocephali stand facing the god and raising their arms in a greeting gesture. Under the boat, in the field: ιαωαβρασαξ → Ἰάω, Ἀβρασάξ.
B: Plain.
A praxis known from a papyrus (PGM LXI 1-38) specifies that love charms had to be incised with the image of Horus on a lotus flower and the magical name Abraxas. Pieces with the Horus-scheme used as love charms: CBd-533, CBd-534.
Bibliography
Michel, BM on CBd-524
The British Museum Collection database on CBd-524