Well at 69/ΟΒ (Late 5th c.)
Lower fill dated to 420-400 B.C. in Agora XXX.
There were no use filling and the well was apparently not a success as a water-supply: there was no concentration of water-jars ... 420-400 B.C.
Flat underside, reserved. The pot had been used for mixing colors, as cinnabar is still present on the inside.
Similar, P 10921 B 13:5; contemporary, P 10986 B 15:1 Hesperia, XVIII, 1949, p. 330, 70 ... 425-400 B.C.