Flat base with single circular groove around incuse signature (faint): ΠⲰⲤ[ΦΟΡΟΥ] (dot under sigma).
Fabric, firing, surface
Typical fabric (buff), firing, and surface treatment.
Preservation comment
One large sherd preserves ca. 70% from top and back of lamp, including nearly entire discus, one-third of shoulder, upper handle, and small part of back wall. Two more joining sherds, not connecting to discus, preserve ca. 65% of right base and adjacent wall. Moderate to severe, extensive abrasion, pitting and slight flaking; worn breaks.