Commodus, AE20 of Augusta Trajana, Thrace.

AVTO KOMODOC, laureate, draped, cuirassed bust right.
AVGOVCTHC TRAIANHC, city-gate flanked by two 
battlemented towers, third tower rising from the centre.

Varbanov 934 (this coin).

re-used with permission of CNG cngcoins.com, from
an old auction. Image restored in Sept. 2011.