A: Ouroboros, with head at top to left, enclosing a sphere-like uterus-symbol upside down, with a key above it (?).
B: Inscribed in two lines: αιωσ|σαβαω → voces including variant of Ἰάω, Σαβαώ, with two characteres in between the two lines.
Bibliography
Michel 2001 on CBd-1699