Following an early classificatory scheme by Lamboglia (1955), the type is conventionally sub-divided into three sub-types, known as the Dressel 1A, 1B and 1C, which are still used today. These sub-types are distinguished largely on the basis of differences in the shape of the rim (discussed critically by Tchernia, 1986: 312-20). The rim of the Dressel 1C takes the form of a narrow mouth and a high collar, which flares outwards in the earlier versions, and which Will (1982) suggests is directly derived from her Greco-Italic form Will 1E. There are few significant differences in the shape of the bodies of these three sub-types although those of the Dressel 1A and B tend to be heavier and more cylindrical while that of the Dressel 1C tends to be more spindle-like. Furthermore, the neck of the Dressel 1C tends to be wider at the bottom closer to its junction with the shoulder. The Dressel 1 is sometimes stamped on the rim and very occasionally on the neck. Where present, the stamp normally consists of two or three letters, sometimes more, or a symbol (such as an anchor or trident) or both. Alphabetical symbols were used in the ager cosanus, particularly at the kiln at Albinia, while elsewhere the stamps are quite often in the form of names (e.g. Sestius). More »