Alexander III, AR "Poros" dekadrachm (5 Shekels). 40.08 g. 
Babylon mint, struck ca. 327 BC. 

Xi above. Alexander on Bucephalus right, thrusting long 
spear at a mahout and his master seated right on an 
elephant, the mahout and master looking backwards and the 
master grasping the the end of the spear whilst the mahout 
wields a spear over his head and holds two more spears in 
his left hand. 
Alexander standing left in military dress, holding a 
thunderbolt and a long spear, Nike, holding wreath, flying right above. AB monogram in lower left field.

Prospero Coll. 304; Price, "The Poros coinage of Alexander the Great", pp 75-76; Mitchiner Type 21; BMC pl. XXII, 18; 
Duerr 1 in Schweiz. Muenzbl. 94; Hollstein "Taxiles Prägung", 2.
Extremely rare. 

With permission of Baldwin's, Markov and M&M Numismatics at 
The New York Sale XXVII, The Prospero collection, Jan. 2012