Sogdian legend around square hole nny'βy't smyδ'nč, which can be translated as 'Nanaiabiat Samidanian', Samitan being the town's name, Nanaiabiat the ruler / Tamgha each side of square hole. 20mm, 1.28 g. Fedorov pl.24, #1-6. 

Very nice quality example with clear legends and tamghas, but it was cast on a thin flan and has a few small original casting holes.

The identical tamghas are in the form of a semi-circle on a pedestal; small annulet in semi-circle.