A: Womb with a seven-bitted key below it, fallopian tubes visible. Engraved circle on the surface of the womb.
B: Greek inscription in four lines: θαλβου|θαλβαα|ορωριο|υθ → unidentified vox (R. Merkelbach: variants of Ἀβλαναθαναλβα-palindrome?) and ορωριουθ.
Bibliography
Philipp, Mira et Magica on CBd-2137
Michel, DMG, 54.1.b_10.
Images
Cast of CBd-2137 obverse and reverse in the Gem Impressions Collection of Cornell University Library