The Dressel 20 is a large globular form, with two handles and thickened, rounded or angular rim, concave internally. The rim shape develops from more rounded forms in the 1st century. Commonly stamped, most often on the summit of the handle, but occasionally on the neck or body. Abundant coarse white and multicoloured inclusions of quartz, limestone feldspar and composite rock fragments, slightly micaceous. Deep, but uneven wheel marks on the internal surface.
Later examples tend to be red in colour, harder and white-slipped.
Capacity Average 60-5l, but ranging from 40l to 80l. Date Oberaden 83 form found in small quantities on Augustan sites in Britain, but the classic Dressel 20 form is present on a few sites from Claudian period. Distribution Widespread around the western Mediterranean. Large numbers exported to Rome during the 2nd century AD where the broken vessels form the Monte Testaccio. Aliases Augst class 1.