Weight
In addition to the native system of deben and qedet, Egyptians also used a system called beqa or, ‘the gold standard,’ as well as Mesopotamian, Syrian, Greek and eventually Roman systems. The beqa system was in use in Egypt since at least the reign of Khufu in the Old Kingdom, and is sometimes called the 'gold standard,' because some examples have the Egyptian hieroglyph for 'gold' stamped on them. Metal weights generally belong to Greco-Roman times and later. This smallcomed, circular weight, has a vertical loop handle on the top. The opening in the loop is small, and the ends are squashed flat onto the dome. It probably belongs to the Late Period or Ptolemaic period.
It may correspond to the beqa system, though it is sometimes difficult to determine the precise value of metal weights. As Petrie wrote: “Metal weights have almost always undergone alteration over the centuries, both losing and gaining weight. The loss is by wear, by solution of compounds, and, especially on bronze weights, by scaling of compounds; the gain is by the oxygen and carbonic acid locked up in the compounds, for nearly half the weight of green carbonate of copper is gain from the air.” Glass Stamps and Weights, British School of Archaeology, 1926, p.22.