Watch List notes:

JUSTINIAN I, (527-565), AE follis, Constantinople mint, (22.27 g) issued year 13 = 539-540, officina A, obv. Justinian bust facing, DN IVSTINI ANVS PP AVC, rev. M, A below, year XIII, CON in exergue, large thin flan, (S.163, DOC.38a, BMC 41a). Large flan, with dark green and brown patination, nearly extremely fine and scarce.

The second year of issue of the new large and heavy type folles.