Byzantine Inscribed Weight Group

3rd-6th century AD. A group of three bronze weights (??????? ??????), a round one with incised Greek capital letter '?' (ni) within a circle; an octagonal with a inlaid inscription'???' (ni-iota-beta); a square with an image of two crowned emperors. 133 grams total, 15-35mm (1/2 - 1 1/2"). Property of a Dutch gentleman; formerly in an old collection formed in the 1970s. [3]
Condition Report: Fine condition.