PB Byzantine lead seal of Nicholas? (11th century AD).

PB Byzantine lead seal of Nicholas? (11th century AD).
Obv: Bust of St. Nicholas holding his right hand in attitude of blessing and a book in his left. No sigla visible. Border of dots.
Rev: Inscription of at least five lines.
Weight: 5.30 g.
Diameter: 19mm.

Year: 11th century
Diameter: 19 mm
Weight: 5.3 g
Material: Lead