Watch List notes:

Constantine II. As Caesar, A.D. 317-337. AE centenionalis (18.83 mm, 2.73 g, 1 h). Thessalonica mint, struck A.D. 319. CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust of Constantine II right / VIRT EXERC, elevated perspective view of monumental stepped pedestal base surmounted by statue of radiate Sol, raising hand and holding globe / · TS · B ·. RIC 71. VF / good VF, light olive-green patina, some roughness obverse. 

This reverse has long been said to be a view of an army camp from above. Carson's "new" interpretation of a statue on stepped base makes more sense