A Byzantine Period brass weight with a silver inlay four Kerátion (English: carat; Latin: siliqua), for the weighing of gold coins. It measures 13.0 mm x 12.9 mm x 1.6 mm and weighs 0.60 g. The weight is made of a brass alloy of 78% copper and 22% zinc  and bears a silver inlay with the Greek letters “ΚΔ”. The Kappa designating the keration weight unit and the Delta signifying the number four. Square brass weights of this type were predominantly manufactured during the fifth and sixth centuries.