I love that dragon! It smashes right through the belief that dragons occur only in the Chinese and European cultures.
I am surprised there are so many civic coins from Erevan. Thinking about it, I wonder if it had to do with Erevan's embattled position between Iranian, Ottoman and Russian ambitions. It may have been quite unsafe outside the city walls for long periods. IIRC, there was even a (national) mint in Erevan, striking silver coins. That seems unwise in uncertain times and so close to the border, but maybe it was the only option in the situation?
Peter