Andronicus I Comnenus (1183 - 1185 AD) Billon Trachy (severely 
debased silver, 28 mm, 3.93 grams), minted at Constantinople. 

Mary, nimbate, standing and facing on dais. / Christ nimbate and 
bearded on right, Andronicus left. SB1985. 

With permission of Numismatica Ars Classica, Auction 52
Sold for 800 Swiss Francs.