The White Vizier’s Astrolabe

Revisiting the Kings & Pawns exhibition today, I discovered this delightful little cartoon of a chess game.

And it made my day that, at 4:15, the white vizier pulls out what looks like an astrolabe!
The white vizier's astrolabe from the short film 'The Rook'.Its rete seems to be made up of astrological symbols(?), and he only uses it as a surface for casting his dice. But still!

EDIT: The object he is holding may not be an astrolabe after all, but an astrological geomantic plate (such as this one from the Khalili collections).