A group of Byzantine bronze buckles and fittings, some with yellow and blue enamel, 7th century and later (7) Provenance: Private Collection of Theo Sarmas (1938-2018). Theo Sarmas was a London businessman who was a passionate collector of Byzantine ceramics and Greek coinage. Princeton University, New Jersey holds the Theo Sarmas collection of medieval Greek coinage. A group of Byzantine bronze buckles and fittings, some with yellow and blue enamel, 7th century and later (7) Provenance: Private Collection of Theo Sarmas (1938-2018). Theo Sarmas was a London businessman who was a passionate collector of Byzantine ceramics and Greek coinage. Princeton University, New Jersey holds the Theo Sarmas collection of medieval Greek coinage.