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 Dressel 1A has a pronounced triangular rim, often quite difficult to distinguish from the rim of the Greco-Italic type; 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. A broad scheme to distinguish between the varieties of Dressel 1A and 1B handles and spikes has been suggested by Stockli (1979), based mainly on the size of these features, but its practical use is perhaps doubtful given the nuances of form which are sometimes apparent in the general class of Dressel 1 amphora. 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 »