Jade ge of this type are modelled on bronze examples that are seen as early as the Erlitou period. See the drawing of a bronze ge from Henan Yanshi Erlitou, c. 1900-1600 BC, illustrated by J. Rawson, Chinese Jade from the Neolithic to the Qing, British Museum, 1995, p. 192, fig. 2. In the drawing one can see that the butt has a band of parallel raised lines below four projecting parallel sections edged with ridges. These features were than translated into the carved decoration of some jade ge, such as one in the British Museum, illustrated ibid., p. 193, fig. 3, and the present example. Another similar jade ge of similar length which, like the present ge, has the lozenge band immediately below the ribbed butt end, in the collection of D. David-Weill, Paris, is illustrated by A. Salmony, Carved Jade of Ancient China, Berkeley, California, 1938, pl. V (2).