Marcus Aurelius and Lucius Verus, AE, Rome. AD 161-180. 23.82 g. 

No legend, bare head of Marcus Aurelius right facing bare head of Lucius  Verus left. 
No legend, Salus seated left, feeding serpent coiled around altar. 

Szaivert MIR Em. 3 pp. 176-177 var.
Extremely rare. 

With permission of Numismatica Ars Classica, Oct 2015.
Auction 87, Lot 269

Reference cited: Szaivert, W. Die Münzprägung der Kaiser 
Marcus Aurelius, Lucius Verus und Commodus (161-192).