Identification
| ID in this catalogue | WCO 17 | 
| Type | Outflow water clock | 
| Current Location |  | 
| Catalogue Numbers | 12290 | 
| Provenance | Saqqara (?). | 
| Date | Early Ptolemaic Era | 
| Dimensions | Height 12.2 cm; width 14 cm | 
| Material | Granite | 
| Condition | Fragmented piece | 
| Publications | Neugebauer and Parker (1969) | 
Content
| External registers | Likely three, in the pattern of the Karnak water clock (WCO 1). | 
| External upper band of text | Yes | 
| External lower band(s) of text | Unknown | 
| Exterior Astronomical Diagram | Fragment only preserves part of the top rim and upper part of top register, including a partial decan list and a falcon-headed god (the planet Jupiter). Full description of the AR1-type diagram here | 
| Rim | Unknown | 
| Interior markings | Small circles indicating hour marks | 
| Other features | Unknown | 
Notes
The object arrived in the Museum as a gift of De Grueneisen in 1930. It is not on display.
See also Schomberg, A. Berlin Waterclock Project, ID 34 Florence 12290, 2019, Edition Topoi, DOI: 10.17171/2-10-28
Images
See https://brunelleschi.imss.fi.it/galileopalazzostrozzi/object/FragmentOfHourglass.html
