The main characteristic of D I 3 is the form of its nozzle, which is tangent to the lamp rim (nozzle form Bus. 3). Bailey type O group iii shows the same nozzle form and therefore corresponds to Bussière form D I 3, but the author points out that the five BM lamps all have a handle. Of nineteen Algerian examples in Bussière 2000, twelve do not have a handle, which is also the case with Getty cat. 278; the four other Algerian lamps in Bussière 2000 have a handle, as do cats. 279–82 and cats. 329–32. The shoulder forms in this type vary a lot (Bussière 2000, p. 93). Among the Getty lamps we find Loeschcke shoulder forms VI a (2 ex.), VI b (3 ex.), VII a (1 ex.), VII b (5 ex.), VIII a (1 ex.), and four unrecorded variants. Three lamps have a plain discus; seven have a mythological motif; two a geometrical one; one an erotic scene; one a circus scene; one shows a dove on an olive branch; and one has a lion. There are five base-rings and eleven bases marked off by one circular groove. Bailey dates his type O group 3 from the middle of the first to the beginning of the second century A.D. A shipwreck at the Balearic Islands dated to A.D. 40–50 (Domergue 1966, pl. 6) has yielded lamps, all signed by CCLODV[ivs], some of them of Bussière form D I 3. The form is present in Campania: two examples found in Herculaneum bear the signature PVF/PVF in planta pedis, an Italic workshop active between the middle and the last quarter of the first century A.D. Another example, found in Pompeii, is signed LVC in planta pedis, an Italic workshop active between A.D. 50 and 80, according to Pavolini (Pavolini 1980, table I). But those early lamps have a basin with a quite thin wall, which is not the case with the Getty examples. Six Algerian lamps bear signatures of workshops starting their activity around A.D. 80: OPPI (starting even around A.D. 70), COPPIRES, L.MVNATVS, LMVNSVC (Bussière 2000, p. 94). Only one lamp, cat. 337, bears a workshop mark of a plain planta pedis. Judging by their coarseness, several lamps—cats. 279–82—are certainly of a later date: second century.
Additional objects of this type: cats. 327–37.