A: Harpocrates sitting in frontal view on a lotus with the left leg bent in knee; under the flower two lotus stalks with buds. His right hand raised to his mouth, his left holds a flail. Around the figure: pseudo-letters.
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-521
The British Museum Collection database on CBd-521