Roman Empire, Constantius Gallus, 351–354, Solidus 351-354, Thessalonica

Roman Empire. Constantius Gallus caesar, 351–354. Solidus, Thessalonica 351-354,  AV 4.52 g.  
D N CONSTANTIVS IVN NOB C  Bare-headed, draped and cuirassed bust r. //
Rev. HOC SIGNO – VICTOR ERIS Julian standing l., holding labarum with Christogram, crowned by Victory, holding palm branch; in exergue, *TES*.  

RIC 146.  Depeyrot 8/1.  

Exceedingly rare, apparently only three specimens known. Several edge marks and slightly bent, otherwise good very fine