Device Held by Ptolomy -- Layout Echo?

[MichelleL11]

Maybe a stylized (and probably earlier) version of something like this astrolabe (also note how the zodiac names are abbreviated):

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Yes, that is possible.

And I agree those abbreviations are . . . unusual.  There are so many moving parts in the text issue and every time I look more closely at the assumptions that need to be made, exceptions pop out of the woodwork to make it more complex.

I've obviously done very little research into the astronomical end of this -- but seeing a familiar pattern, I had hopes.  Also, I now note that Ptolemy's arm doesn't seem to be seen through the device, so some sort of solid thing that nevertheless works by being "held up" is likely.

Thanks for the image!