A: Angel standing to front, head to right, wearing a tunic and a mantle, and holding a globus cruciger.
B: Inscribed in five lines: οα|γιο|σμι|χαη|λ → ὁ ἅγιος Μιχαήλ. 'Holy Michael'.
Bibliography
Bonner, SMA on CBd-450
Spier, Gems on CBd-450
The Kelsey Museum Artifacts Database on CBd-450
Images
A: See the photography by G. Kornbluth
B: See the photography by G. Kornbluth
(In: 'Abrasax gems' of Kornbluth Photography)