Part of the cistern system 44/ΙΓ - 46/ΙΑ - 42/Θ.
Objects with context as "cistern 44ΙΓ, mouth of 46/ΙΑ" are listed with D 12:2.
The following objects are from "earth", i.e. no context layer:
SS 5334, ... Late Hellenistic-Early Roman
Cistern on the lower Acropolis slopes, west of Panathenaic Way; dumped filling of 1st century B.C.
Bottom diameter 3.90m. Cistern with connecting draw-shaft and a dead end tunnel dates from Late Hellenistic ... 1st century B.C.