Foot With Molded Decoration: Pyxis?

Small section of foot, with none of resting surface preserved.

From bottom to top: torus with stamped egg and dart, painted white, with traces of dull yellow over white; ridge and groove; concave band, originally painted pink; two ridges (glazed); vertical fascia; nearly horizontal surface, reserved, \regpara with brown glazed band at edge. Shiny black glaze inside and outside, except for reserved and painted areas.