Another example from DVC's link. I think this is it.

Coela; Thrace; The Chersonese of Thrace
138--161 AE, 18mm, 3.6g
laureate head of Antoninus Pius, r. IMP CAES ANTONINVS
prow, l.; above, two ears of corn AEL MVNI CVELANI
An example from Forvm. The weight of this coin is 4.10g and 16mm, my coin #2 is only 1.8g and 14mm, maybe it's a barbarous imitation?

Bronze dekanummium, SBCV 205, F, Nicomedia mint, 4.10g, 16.0mm, 556-557 A.D.; obverse D N IVSTINIANVS P P AVG, diademed, draped and cuirassed bust right; reverse large I surmounted by a cross between ANNO and XXX (year 30), in ex NIK
Thanks again echizento and DVC. I think I'll soak them for while and see what happens. Not much to lose here.
I also bought a nice Numerian from this dealer which I will post down the line. He is starting to show some interest in ancients and now has a few nice ones, maybe I'll finally have a local source and someone to talk ancients with.