Watch List notes:

temp. Constantine VII Porphyrogenitus. 913-959. Æ Follis (33mm, 9.29 g, 6h). Countermarked issue. Cruciform (T[K]) N C ω monogram (cf. Sear monogram 49) on reverse of a Constantinople mint follis of Heraclius with Heraclius Constantine (SB 810). Fine, earthen black-green patina. Heraclius issue overstruck on an earlier uncertain Byzantine issue, possibly also of Heraclius (cf. SB 805).