Title Water clock (OI)
Water Clock ID WCO 21 (see catalogue of water clocks)
Type Astronomical Representation
Decan List Family AR1
EAT3 Number and Name -
EAT3 Pages and Plates -
EAT3 Decan List Family -
Publications Ritner (2016)
Location Oriental Institute Museum, A7125
Date Ptolemaic, time of Ptolemy II
Registers Probably 2 or 3
Circumpolar Group and Deities ?
Planets Yes (Jupiter and the prow of Saturn's barque)
Decan Names ?
Decanal Stars ?
Personifications of the Decans ?
Cluster Numbers ?
Depictions of Decanal Constellations ?
Decanal Deity Names ?
Decanal Deity Figures Unlikely
Lunar Months ?
Civil Months ?
Nut Unlikely

This fragment of a Ptolemaic water clock is consistent with an astronomical representation similar to that of the Amenhotep III water clock, even preserving Amenhotep's Horus name in a serekh, although the cartouches have Ptolemy II's name. See Ritner (2016) for extensive details, including images of the rim which contains a non-Egyptian inscription. The provenance is also described: Frankfort purchased the fragment in Mosul in 1930 and was told it was discovered in Nineveh.


The fragment preserves only a small part of the rim, in the area of the superior planets. The layout was presumably identical to the Amenhotep III water clock.

Decan List

No part is preserved.


 See Ritner (2016).