i'd say it's a provincial Greek, but i'm not sure of who. somebody should be along shortly that has an idea..
Gregarious is probably right-- Roman Provincial, or pseudoautonomous issue. It's going to be tough because of condition and the ubiquity of the iconography. I can almost make out some of the reverse legend so might help-- hopefully it is the city name. The lion walking right reminds me of coins from Tarsos, so maybe that's a good place to start. I never have much luck with search engines within Wildwinds so I'd try CNG's archives first ("AE, lion walking right"), noting anything somewhat similar, and then going to that city's page in Wildwinds. Your computer's "find on page" function can be very helpful when browsing Wildwinds.
Lion walking right reverse types are particularly common on Roman provincial coins from cities in Moesia Inferior and Thrace, such as Marcianopolis, Nikopolis, Pautalia, Philippopolis, Hadrianopolis and Anchialus. Coins from these mints typically have "centration dimples" from flan preparation, such as are visible on your coin. For these reasons, I suspect this one is from one of these mints. The obverse looks more like Elagabalus than anybody, but could be Caracalla or Geta, too. Here's one of Philippopolis of Septimius Severus with a lion walking left (there is also one depicting the lion walking right) from my own collection. Septimius Severus, AD 193-211 Roman Provincial AE 17.7 mm; 4.06 g Thrace, Philippopolis Obv: [ΑV Κ Λ] CΕVΗΡΟC, laureate and draped bust right Rev: ΦΙΛΙΠΠΟΠΟ[ΛΕΙΤ]-ΩΝ, lion walking left; ox's head before Refs: Moushmov 5274 var. (lion walking right); Varbanov 1305
Would this be a possibility? Roman provincial coin, Demos / Lion rt., Philadelphia in Lydia, reverse legend ending NEWKORW N.
The long-haired yet male bust does look like Demos and on your coin, the two letters behind the bust could be the corroded remnants of ΔH, plus legible bits of the reverse legend generally fit Good job, Kirk! From Wildwinds: Philadelphia, Lydia, AE 23mm, 7.69 g. 198-268 AD. ΔHMOC, youthful head right, long hair bound with taenia, drapery on left shoulder / ΦΛ ΦIΛAΔEΛΦEΩ-N around and in field, NEΩKOΡΩ, N in two lines in ex., lion walking right. BMC 42; Weber 6883; Mionnet IV 547, Kurth, Demos 396.
Maybe similar to this: Philadelphia, Lydia, AE 23mm, 7.69 g. 198-268 AD. ΔHMOC, youthful head right, long hair bound with taenia, drapery on left shoulder / ΦΛ ΦIΛAΔEΛΦEΩ-N around and in field, NEΩKOΡΩ, N in two lines in ex., lion walking right. BMC 42; Weber 6883; Mionnet IV 547, Kurth, Demos 396.
I was a little late with that one... From ISEGRIM: ERD: AM PRO: LYDIA PO : PHILADELPHEIA PZ : Between 198 and 268 TIG: P'L / NEWKORWN Obverse VSG: DHMOS VT : HEAD MAN R / DEMOS VA : TAENIA / CLOTHES Reverse RSG: P'L P'ILADELP'EWN NEWKORWN RT : ANIMAL STANDING R / LION Technical details M : AE GR : 23.8(1) GEW: 6.41(1) / 4.81(2) ST : 06(1) Bibliographical references ZIT: SNG RIGHETTI 1055(1) <GELOCHT> VGL: SLG LINDGREN I 773(2) Additional remarks FR : VS: DHMOS RS: P'L P'ILADELP'EWN NEWKORWN