This coin appears to features Hercules leaning on a club. The obv could be just about anybody, but has a Flavian look to the head. My best guess is Geta, as the Flavians dont appear to have issued coinage in Nicaea Diam: 16mm Wt: 2.9g Obv: ACEM--(??) bare head right Rev: NIKA--, Hercules (?) leaning on club As always, a Wildwinds search was unsuccessful.
Yours is Geta as Caesar. The reverse figure is Eros-Thanatos, I think, like that I discuss here. Caracalla, AD 198-217. Roman provincial AE 17.1 mm, 3.44 g, 12 h. Thrace, Hadrianopolis, AD 198-217. Obv: AVT K M AVP CE ANTΩNEINOC, laureate head, right. Rev: AΔΡIANOΠOΛEITΩN, Nude Eros-Thanatos standing right, left leg crossed over right, leaning with right hand and left elbow on inverted lit torch. Refs: Varbanov 3526; Jurukova, Hadrianople 390.2; CN 5217; Moushmov 2615; cf. SNG Cop 271. Notes: Reverse die match to CN 5217 specimen (Nacionalen Arheologičeski Institut s Muzej, Sofia, no. 1566).