A: Uterus and a seven-bitted key. Inscription within the uterus, vertically from top to bottom: ιαω → Ἰάω.
B: Inscription in five lines: ορωρι|ουθιαηω|ιαωσαβαωθ|ιαωαιεβοθ|σταθητι|μητρα → ορωριουθ, vocales, Ἰάω, Σαβαώθ, Ἰάω, αιεβοθ, στάθητι μήτρα. 'Uterus, stand still!'
Bibliography
Michel, BM on CBd-728
The British Museum Collection database on CBd-728