Watch List notes:

The Roman Empire

Hadrian, 117 – 134. Aureus 132-134, AV 7.20 g. HADRIANVS – AVGVSTVS Laureate head r., slight drapery on l. shoulder. Rev. COS – III Column surmounted by helmet; against which rests parazonium, spear, shield, cuirass and helmet. C 424 var. (without drapery). BMC 451. RIC 194d. Calicó 1237 (this coin).
Extremely rare. Struck on a very broad flan and very fine

Ex Stack's Bowers and Ponterio sale 174, 2013, Ebert, 5028.