Glass weight, Fatimid Dynasty
Mint: None, made in Egypt
Ruler: Caliph al-Hakim (996–1021) or al-Mustansir (1036–1094)
Collection of the Hallie Ford Museum of Art, Willamette University, Salem, OR, Gift of Gary Leiser, 2017.052.482.
Because coins were made by hand, it was difficult to ensure their true weight, and glass weights were devised to help establish that accurate measure.