Collaboration from Robert H. van
Several Ptolemy portraits can found in this book:
BENNETT, J.A., & D.B. Meli, Sphaera Mundi -
Astronomy Books 1478-1600, Whipple Museum of the History
of Science, Cambridge, 1994.
Page 25 has a woodcut of Ptolemy holding an astrolabe and
an unidentified person reading a book under a schematized
celestial sphere from the 1514 Vienna edition of the
Tabulae eclypsium of Georgius Puerbachius and the
Tabula primi mobilis of Johannes Regiomontanus.